Juglans. The ancient Latin name, first used by Pliny, contracted from Jovis glans, the nut of Jove or Jupiter. A genus of about eight species, three or four of these indigenous to the United States.

Order, JuglandaceÆ (Walnut family).—Medium to large deciduous trees with odd-pinnate leaves; leaflets from fifteen to twenty-one, serrate, mainly oblong and pointed. The sexes of flowers separate (monoecious) on the same tree, the males in pendulous green cylindrical catkins two to three inches long, solitary or in pairs, sessile,—not stalked, as in the hickories,—issuing from the one-year-old twigs, and at the upper edge of the scar left by the falling leaf of the previous season (Fig. 73), showing that the male organs emanate from an aggregation of bud-cells in the axils of the leaves during the preceding summer and autumn. Female flowers terminal on the new growth in spring, also single, in clusters, and occasionally in long pendulous racemes with a four-cleft calyx, four minute petals and two thick curved stigmas. Fruit round or oblong (Fig. 74); husk thin, drying up without opening by seams, as in the hickories. Shell of nut either rough and deeply corrugated, with sharp-pointed ridges, or quite smooth, with an undulating, wavy surface, very thick in some species and thin in others; kernel two- or indistinctly four-lobed, united at the apex, fleshy, rich and oily.

History.—The common walnut, so long and widely known in commerce under various names, such as Persian, English, French, Italian and European walnuts, also as Madeira nut, and recently Chile walnut, are now all believed to have descended from trees native of Persia, most plentiful in the province of Ghilan on the Caspian sea, between latitude 35° and 40°, hence the old Grecian name of the fruit, viz.: Persicon and Basilicon, or Persian Royal nut, probably because either introduced by the Greek monarchs, or sent to them by the Persian kings. Later,—according to Pliny,—the Greeks called the trees Caryon, on account of the strong[205]
[206] scent of the foliage, and from this name Nuttall coined his word, Carya, for our indigenous hickories, as explained in the preceding chapter. It should also be noted here that the elder Michaux, in 1782-4, was the first modern botanist to visit the province of Ghilan, and he determined, by personal investigation, that this species of the walnut was really indigenous to that region of country, along with the peach and apricot.

Earlier European authors claim that the walnut was first introduced into Italy by Vitellius (emperor) early in the first century of the Christian Era,—but this is uncertain,—the Romans giving it the name of Juglandes, or the nut of Jove or Jupiter, both being the same mythical personage. The nuts, at this early day, were highly prized, and also the wood of the tree, the latter being even more valuable than that of the citron (orange and lemon). Ovid wrote a poem about these nuts, entitled De Nuce, from which we learn that boys were employed to, or did of their own accord, knock off these nuts; and that at marriages walnuts were thrown by the bride and bridegroom among the children, a ceremony which was supposed to indicate that the bridegroom had left off his boyish amusements, and that the bride was no longer a votary of Diana, and it is quite probable that the French word for nuptials, des nÔces, was derived from this ancient custom. The ancients also believed that walnuts possessed powerful medicinal properties, even to the curing of hydrophobia; but in these latter days they have lost most of their curative virtues, in the opinion of the medical fraternity.

As with the chestnut, the planting of the walnut extended northward into Gaul (France), hence the earlier name of Gaul nuts, which became corrupted into walnuts by the English-speaking people. The Italian name is Noci; in France, Noyer; and the Germans, with their usual habit of compounding names, call it walnuss-baum or walnut tree.

Joannis De Loureiro, in his work on the plants of China, "Flora Cochinchinensis," published in 1790, claims that this Persian walnut is also a native of the northern provinces of China, with two other species which he describes (p. 573), adding, however, that one of these is cultivated in Cochin China, and the other is found wild in the mountains.

The wild form of this world-wide-famous nut is, doubtless, quite different from the varieties with which we are familiar, for two thousand years or more of continuous cultivation and selections have greatly changed the character of these nuts, as well as the habit of the trees. The nuts from the wild trees are said to have a rather thick shell, and to be much smaller than the best of the improved cultivated varieties, or very like those we now obtain in China and Japan. The Persian walnut, in its many varieties, has been planted almost everywhere in Europe as far north as Warsaw, but does not appear to have run wild and become naturalized, as with many other kinds of fruit and forest trees. In Great Britain it has probably been cultivated ever since the invasion of the country by the Romans, although a much later date is named by some of our modern horticultural authorities. Dodoens (1552), Gerarde (1597), Parkinson (1629), and other of our early authors of works on cultivated plants, speak of the Persian walnut as common in various countries of Europe, Great Britain included. John Evelyn, in his "Sylva" (1664), says:

"In Burgundy, walnut trees abound where they stand, in the meadows of goodly lands, at sixty and a hundred feet distance, and so far as hurting the crop, they are looked upon as great preservers, keeping the ground warm, nor do the roots hinder the plow."

Evelyn, no doubt, had read what Pliny had said on this point, viz.:

"Even the oak will not thrive near the walnut tree; which, if it be true, may be owing to the interference of their roots in the subsoil; but it is certain that neither grass nor field nor garden crops thrive well under the walnut."

Evelyn was far too good a gardener and close observer to fall into the error of attributing noxious properties to the walnut tree, although Pliny's assertion, which has no foundation beyond his imagination, has been many times repeated in these days of supposed general intelligence. Small plants may fail, under the shade of large trees, or when deprived of moisture by the roots of such trees, but the walnut is no exception to the rule; in fact, such deep-rooted kinds are less injurious than those with roots nearer the surface. Evelyn, in continuing his account of the walnut in Germany, says:

"Whenever they fell a tree, which is only the old, decayed, they always plant a young one near him, and, in several places betwixt Hanau and Frankfort, no young farmer whatsoever is permitted to marry a wife till he bring proof that he is a father of such a stated number of walnut trees; and the law is inviolably observed to this day, for the extraordinary benefit which this tree affords the inhabitants."

What a pity that some such custom could not have prevailed during the past century in the United States. The author from whom I have just quoted adds that the Bergstrasse, which extends from Heidelberg to Darmstadt, is all planted with walnuts.

Cold winters, however, have occasionally played havoc with the walnut trees in Europe, and one of these occurred in 1709, when the greater part of the trees were seriously injured, especially in Switzerland, Germany and France. Many trees were cut down for their timber, which is always in great demand for gun-stocks and furniture. Certain Dutch capitalists, foreseeing the scarcity of walnut timber, bought up all they could procure, and years afterwards sold it at a greatly advanced price. In the year 1720 an act was passed in France to prevent the exportation of walnut timber, and this led to the planting of these trees more extensively than at any previous date; this practice has continued to the present time, hence the immense revenue secured from the exportation of these nuts. The people of the United States are good customers for the surplus stock of Europe, and will probably so continue, until we wake up to a sense of our folly of perpetually buying articles that could be readily produced at home, and at a very large profit.

Persian Walnut in America.—The date of the first experiment in planting this nut in this country is now probably unknown, but the oldest tree that I have been able to find with anything like a satisfactory history, is still growing vigorously at Washington Heights, on Manhattan Island, near 160th street and St. Nicholas avenue. I gave a brief history of this noble monarch of its race in the American Garden for September, 1888, from which the following account is condensed:

"In 1758 Roger Morris, an English gentleman, built a spacious mansion on his estate, at what, in later years, became known as Washington Heights. His grounds were well laid out for that time, and many rare foreign trees and shrubs planted, among them several, as then called, English walnuts. Whether these trees were raised from the nuts, or plants of some size imported, is not now known. Mr. Morris may have procured the seedlings from the Prince Nursery, Flushing, L. I., for this famous garden was established in 1713, or forty-five years previous to the building of the Morris mansion and the planting of the grounds about it.

"At that period no one doubted the hardiness of the so-called English walnut in America, and as most of the nuts and trees procured for planting came from acclimated stock in Great Britain or the cooler region of Europe, success usually attended such experiments. Our pioneers and horticulturists fully expected that the trees would thrive and bear nuts in abundance, and time has shown that they were not mistaken, although we frequently see it stated at this late day, that the Persian walnut is not hardy north of the latitude of Washington, Philadelphia, or other cities south of New York.

"One hundred and thirty-eight years have rolled by since walnut trees were planted at Washington Heights, and at least one of the originals has escaped destruction and holds its head aloft, defying the tempests which frequently sweep over that elevated and exposed spot on Manhattan Island. This veritable patriarch of its race in America is a monster in size, its stem between four and five feet in diameter at the base and more than seventy-five feet high, with wide-spreading branches.

"In the summer of 1776 the Battle of Long Island was fought, and the American forces were compelled to retreat in confusion to New York, thence northward up the island; but when they reached Fort Washington, not far from the eleventh milestone on the old Albany post road, they made a stand and proceeded to entrench themselves at that place. This was in September, 1776, and General Washington took possession of the Morris mansion near by, making it his headquarters, and, as this was at the season when the walnuts had reached an edible stage, we may safely presume, from his well-known predilection for such delicacies, that he tested the quality of the Morris walnuts. One hundred and twenty years later I am writing this, with some fresh specimens of nuts before me from that same old tree.

"This old patriarch has cast its shade over many a noted person in its time, for in 1810 the Morris estate passed into the hands of Madame Jumel, a lady long famous for her hospitality and the good cheer she extended to the surviving patriots of the Revolution. From 1810 to the time of her death, 1865, Madame Jumel's household always had an abundance of walnuts from the old tree, and one of the workmen on the place informed me that about two cartloads was considered a fair annual crop."

It cannot be many years before this old tree will meet the same fate that has overtaken many of its younger contemporaries which were once growing in the neighborhood, for with the rush for building lots and the opening of new streets and avenues, trees are usually in the way, and in such cases even patriarchs are not sacred, nor do they command much respect from our urban population.[2]

A half-century ago there was quite a large number of walnut trees scattered about on the northern half of Manhattan Island, many of these probably descendants of the old Morris trees, but of this nothing definite is now known. A number of persons whose ages permitted them to scan the early days of the present century, have assured me that in their childhood they had often collected walnuts from goodly sized trees on farms, from Harlem northward on the island. The largest number of Persian walnut trees planted in any one place was on the Tieman farm at Manhattanville, these being set out as roadside trees, some of which are still standing, although in the march of improvements they must soon disappear. These trees have always been noted for their productiveness, bearing a full crop every alternate year, and a lighter one in what is termed the "off season."

While the old Morris walnut tree, and the large number growing on the Tieman estate, and scores of others scattered about New York city and its suburbs,

have been, and many still are, living witnesses of the fact that varieties of the Persian walnut will thrive in this latitude, certain horticultural authors and essayists have continually asserted the contrary.

Mr. F. J. Scott, in his superb and voluminous work, "Suburban Home Grounds," in speaking of this species of the walnut, says, p. 351:

"Though greatly valued in England and on the continent for its beauty, as well as for its nuts, its want of hardiness in the Northern States, and lack of any peculiar beauty in the South, has prevented its culture to any great extent in this country. South of Philadelphia it may be grown with safety."

This seems strange language to have come from such an eminent authority as the late Mr. Scott, inasmuch as he must have passed a hundred times within sight, if not in the very shadow of the rows of old walnut trees growing at Manhattanville, when going from New York city to Newburgh, where he studied landscape gardening under the lamented A. J. Downing, and to whom the work from which I have quoted is dedicated. It is quite evident, however, that our author, like many others, failed to see things that should have interested him.

As an offset to Mr. Scott's idea of the northern limit for the successful cultivation of this nut, I may refer to the work of Mr. George Jacques, "Practical Treatise on Fruit Trees, Adapted to the Interior of New England," published at Worcester, Mass., 1849. In referring to the European walnut, p. 238, he says:

"It is perfectly hardy on Long Island, and to the south of New York, and as far north as the city of Charlestown in this State (Mass.), where there may be seen, in the enclosure of a residence on Harvard street, two fine trees of this kind, either of them much taller and larger than our large-sized apple trees. We have eaten nuts from these trees well ripened and fully equal to any of those imported. The trees often bear a crop of some bushels."

It is unnecessary to search for further proof to show that certain excellent varieties of the Persian walnut do thrive and bear abundantly in our Northern States; not, perhaps, in the extreme boreal borders of New England, nor in those of the northwest, but the acclimated sorts are pretty safe as far north as 42° of latitude, and in protected locations may crowd up a half degree more. I have found very productive trees of this nut in northern New Jersey, several in Bergen county, others in Passaic, and thence southward, and while they are few in number, they are sufficient to prove that this tree is adapted to the soil and climate of the entire State. We seldom find more than one or two trees in any garden, and these are probably more the result of accident than design, their owners seeming to be satisfied in possessing something in the way of a tree not common in the neighborhood, never thinking that it might be well to plant enough of such trees to have them become a source of revenue. The parentage of quite a number of these bearing trees is readily traced to the Morris and Tieman stock, showing that these old trees are of a hardy and prolific race, which are well worthy of perpetuation for cold climates. Very old and large walnut trees are reported as growing in Pennsylvania and other of the Middle States, but they are far from being numerous. It has long been claimed that this species of nut succeeded best in the Southern States, and it is probably true, especially with the tender varieties; but for some reason, unknown to me, they have not been planted there in sufficient numbers to have, as yet, become of any commercial importance.

During the past twenty-five years these nuts have been more extensively planted in California than elsewhere in the United States, and we may expect soon to know something definite in regard to results. Nearly all of the favorite French varieties have been introduced, and are now being tested in different parts of the State, and it is quite likely that the greater part will succeed, although some of the early-blooming sorts may fail in localities subject to late spring frosts. Previous to the introduction of grafted trees of the named varieties, the only trees of this kind planted in California were seedlings raised from the common imported nuts; but I have no statistics at hand to determine the date of the first plantings of this kind.

Of late years there has been received, at some of our seaports, and especially at New York, some quite large consignments of walnuts from South America, under the name of "Chile walnuts," but they are only varieties of the Persian raised in Chile. They are generally of good size, moderately thin shelled, with plump kernels of excellent flavor. They are in great demand for confectionery, and are really better for such purposes than the larger and fancy bleached walnuts imported under the somewhat general name of Grenobles, or French walnuts. Owing to the difference of climate, these Chile walnuts arrive here late in winter, or about the time those coming from European countries the previous autumn begin to become somewhat stale.

Of our native species of this genus (Juglans), the almost everywhere common butternut ranks first in flavor and general estimation, but owing to its hard, rough shell, and the difficulty in extracting the kernel, it has never become of any considerable importance, although usually found in our markets in limited quantities. Of course, it is a general favorite in the country, and wherever found in sufficient quantities the boys and girls lay up a goodly supply for winter use; and cracking butternuts during the long winter evenings is a pastime and pleasure not to be ignored nor forgotten. The flavor of the butternut is far more delicate, and better, than any of the Persian species, but the difficulty in extracting the rather small kernel is a serious objection.

The black walnut has a larger kernel, in proportion to its size, than the butternut, and it is not so difficult to extract when the nuts are dry, but the flavor is too rank for most palates, although it has often been referred to as excellent by the earlier botanists who visited this country; but it has never been considered of much value until quite recently, or since the manufacturers of confectionery discovered that heat somewhat subdued the rank flavor, and now many tons of the meats are annually consumed in candies and walnut cakes. I am credibly informed that cracking black walnuts and shipping the meats to our larger cities has become quite an extensive industry in several of the Middle and Western States. We have two other but smaller native species of the walnut that will be described further on, under the head Species and Varieties.

Propagation of Walnuts.—The propagation of the walnut in the natural way, or by seed, is exceedingly simple, for the nuts grow readily and freely if planted soon after they are ripe, or any time before they become old and the kernels shriveled. It is, of course, best to plant them while fresh, but they are not at all delicate, and may be transported a long distance in a dry condition without seriously affecting their vitality. If walnuts are given the same care as recommended in the preceding pages for other kinds of nuts, so much the better.

The seedlings of walnuts, like those of other species, usually produce long taproots, and if grown in a compact soil, these will have few small lateral fibers the first season, as shown in Fig. 75; but when taken up and the vertical main root shortened at a, and then replanted, they produce fibrous roots in abundance. The trees of almost any age from one to twenty years old, are not at all difficult to make live when transplanted, provided the branches or tops of the trees are reduced, to correspond with loss of roots in digging up at the time of removal. It may be well to give a word of caution to the novice in nut culture about pruning nut trees in spring, after the sap begins to flow; for if done at this time they will bleed freely and leave unhealthy wounds and black, unsightly spots on the bark. Prune walnuts in summer or early in winter, to give time for the wounds to season before the buds swell in spring. If young trees are to be dug up, prune after they are taken from the ground, then the sap will not flow from the wounds. This is true of all deciduous trees, vines and shrubs. If the trees have few small roots when taken up, prune severely; but if roots are abundant, little pruning will be required. It is seldom, however, in transplanting walnuts, that the pruning need be as severe as recommended for the chestnut; in fact, having transplanted walnuts of various species, and of all ages from one to twenty years, without the loss of a plant, I have come to the conclusion that they are pretty safe trees to handle, in this climate, at least, if not elsewhere.

In seeking walnuts from a distance, for planting anywhere in the Middle or Northern States, it will be well to learn something in advance about the climate in which the nuts are raised; for it would be folly to send for either trees or nuts to a warm or semi-tropical region, like that of southern France or Spain, for a stock to cultivate in a climate as cold as that of New York, New Jersey, and States on the same line westward. We might, perchance, from such importation, secure one hardy plant in a hundred or thousand, but there would be no certainty of even this small number.

This idea of acclimation and adaptation of trees to conditions and climate should not be overlooked by the nut culturist, no matter from what source he procures his stock, whether from abroad, or some distant region of his own country. If it can be obtained from a region where it has been growing under conditions similar to those to which it is to be transferred for cultivation, then the chances of success will certainly be largely augmented. Acclimation is a slow process; in fact, too slow for us to expect to secure any appreciable advantages from it in a lifetime, but in nature we seek final results, leaving time out of the question.

In raising seedling trees we cannot expect much more than a reproduction of the species, and not that of the parent tree. Plants that have been subjected to unnatural conditions and surroundings, as usual under cultivation, are far more likely to show a wider range of variation in the seedlings than those growing wild in their native habitats; but even the latter cannot be depended upon to reproduce exact types from seed. In other words, there is nothing certain about seedling nut trees; the large nuts may produce trees bearing very small ones, the early-ripening give late ones, the tall dwarf trees and the precocious fruiting some of the most tardy varieties; and yet, with all this uncertainty, we still think it best to select for planting the best nuts obtainable, i. e., best and most promising for the conditions under which the seedlings are to be grown.

For the multiplication and perpetuation of choice varieties we must resort to artificial modes of propagation, mainly by budding and grafting. These modes, however, while the best at present known, are so difficult and uncertain in cool climates,—even in the hands of the most skilful propagators,—that grafted walnut trees have never been very plentiful in the nurseries of this or other countries with which we have commercial relations. In the south of France nurserymen appear to have been more successful in the propagation of walnuts by budding and grafting, than elsewhere; but in the northern provinces, as well as in Great Britain, we hear little of this mode of propagation. So difficult has this mode of propagating the walnut been considered in England, that Thomas Andrew Knight, president of the London Horticultural Society, early in the present century discouraged all attempts to propagate this tree by such means; but later, in a paper read before the Society April 7, 1818, he admits to having changed his mind, especially in regard to budding the walnut, and says:

"The buds of trees of almost every species succeed with most certainty when inserted on the shoots of the same year's growth; but the walnut tree appears to afford an exception; possibly, in some measure, because its buds contain within themselves, in the spring, all the leaves which the tree bears in the following summer, whence its annual shoots cease to elongate soon after its buds unfold; all its buds of each season are also, consequently, very nearly of the same age, and long before any have acquired the proper degree of maturity for being removed, the annual branches have ceased to grow longer or to produce new foliage.... To obviate the disadvantage arising from the preceding circumstances, I adopted means of retarding the period of the vegetation of the stocks comparatively with that of the bearing tree: and by these means I became partially successful. There are, at the base of the annual shoots of the walnut and other trees, where these join the year-old wood, many minute buds which are almost concealed in the bark, and which rarely or never vegetate but in the event of the destruction of the large prominent buds which occupy the middle and opposite end of the annual wood. By inserting in each stock one of these minute buds and one of the large prominent kind, I had the pleasure to find that the minute buds took freely, while the large all failed without a single exception."

From the above and other remarks of Mr. Knight, in the paper read by him, I infer that he kept the stocks in pots stored in a cool place in spring, until he could obtain shoots of the season from bearing trees, and from these minute undeveloped axillary buds for inserting in the stocks. These buds, as he informs us, are inserted in the wood of the preceding season, and near the summit or top. He does not give any directions for holding the buds in place, whether by waxed or plain bass ligatures; the former, however, would probably be preferable, for the purpose of excluding the air and water.

Some twenty years later (1838) J. C. Loudon, in "Arboretum Britannicum," etc., refers to the propagation of the walnut as follows:

"Much has been written on the subject by French authors, from which it appears that in the north of France, and in cold countries generally, the walnut does not bud or graft easily by any mode; but that in the south of France and north of Italy it may be budded or grafted by different modes, with success. At Metz, the Baron de Tschoudy found the flute method (Fig. 76) almost the only one which he could practice with success. By this mode an entire ring of bark, containing one or more buds, is removed from a twig on a tree to be multiplied, and transferred to the stock, and made to fit as shown. If the ring is too large, a slice may be cut off; and if too small, a piece of the bark of the stock may be left to fill the space."

Both stock and parent tree must be in about the same condition or stage of growth when this ring budding is done, in order that the bark containing the bud may peel off freely from the wood, and this is always in the spring, soon after the buds begin to unfold and the sap is in motion. Loudon says that in Dauphine, France, young plants in the nurseries are budded chiefly by this mode, which succeeds best the closer the operation is performed to the collar of the plant; and the same is true in grafting, the nearer the root the better, as has been found by experience with hickories.

Charles Baltet, in his "L'Art de Greffer," recommends grafting in the usual mode of crown grafting, also flute or ring grafting, in April or May, and ordinary cleft grafting close to the root and at the forks of the branches, etc. He says that the cion should be cut, as much as possible, obliquely across the pith, so that it may be exposed on one side only. He also advises using cions whose base consists of wood of two years' growth, and these furnished with a terminal bud. He cautions propagators against grafting early-growing kinds upon those of later vegetation. If walnuts of any of the native or foreign species have been successfully propagated by budding or grafting, at any of the nurseries in our Eastern States, it has not been made known in the nurserymen's catalogues.

Michael Floy, who early in the present century had quite extensive grounds devoted to fruit and ornamental trees, near what is now the center of New York city, as we learn from his "Guide to the Orchard," published in 1833, claims, in this work, that the Persian walnuts thrive well in this country, but admits that he had never succeeded in grafting the trees, and with the hickories had no better success, although he had tried them many times; but he adds:

"Still I do not say it is impossible either to bud or graft them; but there is something peculiar about it, for both the bud and graft turn black when cut, almost instantaneously. Others may succeed better, but let them try it before they affirm it upon hearsay; they may succeed very well by inarching."

Coming down to the present day, in our search for facts and information in regard to the propagation of varieties of the walnut, we may find it interesting to visit California, which, of all the States of the Union, is perhaps the best adapted to nut culture in general; besides, a larger number of nut trees of various kinds have been planted there than elsewhere in this country. It is in California that we find such men as Felix Gillet, of Nevada City, an enthusiastic propagator and cultivator of fruit and nut trees, and especially of the latter, if we may judge by his works and writings on this branch of horticulture,—and so far as I have been able to learn, he is the only nurseryman in the United States who has grafted walnut trees of many different varieties for sale.

In regard to modes of propagation, Mr. Gillet says that the common mode of shield budding, as employed on fruit trees, fails entirely with small walnuts from one to three years from the seed, and it does but seldom succeed even on larger stocks. When tried on large, old stocks, he advises removing all the wood from the inner side of the strip of bark on which the bud is situated, and at the same time have this strip not less than two inches long and as broad as possible. He describes his mode of grafting walnuts, which does not differ materially from those already given. That he has never attained any very remarkable results may be inferred from the following:

"We will add that the 'grafted walnuts' that we offer were grafted expressly for us, regardless of cost, by the most reliable firm to be found in the walnut district in France, through a process discovered several years ago, and which we will briefly describe for the benefit of people who may be inclined to try this new method of grafting very young walnuts.

"One-year-old seedlings of the size of the little finger, or about one-half inch in diameter at the butt, are selected, the root cut back short enough to permit the planting of the trees in pots of three inches in depth; the trees, previously to being potted, are grafted with cions exactly of the same size, whip or cleft grafting being used; the pots are then taken to a hot or propagating house, and a glass bell set over them to prevent the outside air getting to the grafts, the temperature of the house being kept day and night, at least for fifteen days, or till the grafting has taken, to 70° F. When the grafts are well taken and growing, the glass bells are removed, and the grafts allowed to grow three or four inches, before the little grafted trees are set out in nursery rows; it may be preferable, especially in certain parts of the country, to keep the trees in the pots till the ensuing spring. Forty to fifty per cent of the grafts will succeed, and it is the best that can be done.

"This mode of grafting the walnut, besides requiring a hothouse, needs the care of a skillful person to make it succeed. So are grafted the little trees that we import from France, and that we plant in nursery rows and offer to the public."

For other modes of root grafting, I refer the reader to those recommended for the hickories, in the preceding chapter. Propagating walnuts by layers is practicable, where the small trees have been cut down to force out new shoots near the surface of the ground, then bent down and covered with soil in the usual method of layering woody plants.

Planting and Pruning.—The plants will produce a greater number of fibrous roots if the nuts are planted in light, loose, but rich soil, than in a heavy, tenacious one; but with all kinds it is best to transplant when one or two years old, and cut off a portion of the taproots, as recommended for the hickories. When removed from the nursery rows for final planting, prune away nearly or quite all side branches, leaving only the terminal bud if the trees are not more than six to eight feet high. After final planting where the trees are to remain permanently, very little pruning will ever be required, further than to cut away branches that may cross each other, or to shorten some to give proper form to the head. No tree in cultivation requires less pruning than walnuts.

As a genus of trees the walnuts flourish best in deep, rich loam, rather light than heavy, and in this country require considerable moisture at the roots, and some, like the butternut, succeed best in bottomlands, near creeks and larger streams. If the soil is naturally too dry for such trees, the fault can be readily remedied by the use of some form of mulch applied to the surface of the soil around the stem after planting, renewing this annually, or oftener if necessary, until the trees are large enough to shade the ground.

Walnut trees, as well as the closely allied hickories, are well adapted for roadside planting, and when set in such positions are far less likely to be injured by insects than when planted in orchards or large groups, besides serving a double purpose, being ornamental as well as useful. They may also be planted around buildings, and where other and less valuable trees are generally grown. There are also millions of acres of rocky hill-sides and old fields which might be utilized for nut orchards, and if rather widely scattered over such land they would prove beneficial in shading the pasture grasses. First of all, however, let us have rows of these trees along all our country roads, after which it will be time enough to begin planting them elsewhere.

SPECIES AND VARIETIES OF WALNUTS.

Native of the United States (Juglans cinerea. Linn.). Butternut. White Walnut.—Leaflets fifteen to nineteen, oblong-lanceolate and sharp-pointed, rounded at the base, downy, especially on the underside, petioles covered with viscid hairs; fruit oblong, two or more inches in length, with a clammy husk, not opening when ripe, but closely adhering to the deeply corrugated and rough, thick shell. Trees with wide-spreading branches, and of medium hight, or from forty to fifty feet, but in deep forests sometimes sixty to seventy, with stems two to three feet in diameter. A common tree in moist soils almost everywhere, from the Canadas southward to the highlands of northern Georgia, Alabama, and sparingly in Mississippi and Arkansas, and all the States bordering the Mississippi river northward to Minnesota. A valuable timber tree, with soft, light wood, much used of late for furniture and inside house finishing. In early times the inner bark was employed for making a yellow dye, also as a medicine, the extract being a mild cathartic, hence one of the specific names, Cathartica.

Synonyms.

Juglans oblonga alba, Marshall.
Juglans cathartica, Michaux.
Carya cathartica, Barton, 1818.
Wallia cinerea, Alefeld, 1861.

Varieties of the Butternut.—There are to be found many varieties of the butternut, varying mainly in the size of the nuts, and only slightly in the thickness of the shell; but I am not aware that any of these have ever been propagated, all the trees in cultivation or elsewhere having been grown from the nuts. This nut is, no doubt, susceptible of great improvement, as well as others of the genus, and it is worthy of being experimented with for that purpose, especially in cold, northern climates, where there are few or no other kinds of edible nuts. Probably the most direct and surest way to secure improved varieties is by hybridizing, taking the butternut for the female parent, and the Persian walnut for the male. Hybrids between these two species are already known, and they will, no doubt, become more plentiful as soon as skillful horticulturists are encouraged to produce them. Several hybrid walnuts of other species are figured and described by European horticulturists, but, so far as known, they are mainly accidental productions, and not the result of any direct effort of man; nature, in this instance, merely giving a hint of the possible, leaving us to avail ourselves of the lesson if we feel so inclined.

J. Le Conte, in a list of four hundred and fifty plants, collected by him on the island of New York (Manhattan), and published in the "Medical and Philosophical Register," Vol. II, 1812, mentions a hybrid walnut among the number. Dr. John Torrey, in "Catalogue of Plants," etc., 1819, refers to this tree under the name of Juglans hybrida, and says that it is growing near where Eighth avenue intersects the road called Lake Tours, about three miles from the city, and is a large tree. This specimen probably disappeared long ago, and we have no means now of determining its origin or between what two species it was a hybrid.

Recently Prof. C. S. Sargent has discovered other hybrid walnuts in the neighborhood of Boston, and figured and described one in Garden and Forest for Oct. 31, 1894. He says:

"My attention was first called to the fact by observing that a tree which I had supposed was a so-called English walnut (Juglans regia), in the grounds connected with the Episcopal school of Harvard college, at Cambridge, was not injured by the cold of the severest winters, although Juglans regia generally suffers from cold here, and rarely grows to a large size. This individual is really a noble tree; the trunk forks, about five feet above the surface of the ground, into two limbs, and girths, at the point where its diameter is smallest, fifteen feet and two inches. The divisions of the trunk spread slightly and form a wide, round-topped head of pendulous branches of unusual symmetry and beauty, and probably sixty to seventy feet high. A closer examination of this tree showed that it was hardly to be distinguished from Juglans regia in habit, in the character of the bark, or in the form and coloring of the leaves, and that the oblong nut, with its thick shell deeply sculptured into narrow ridges, was the slightly modified nut of our native butternut, Juglans regia. Two other trees with the same peculiarities were afterwards found. One is a large, wide-spreading specimen, with a trunk diameter of four feet three inches about two feet above the surface of the ground, and just below the point where it divides into three large limbs. This is on the grounds of Mr. Eben Bacon of Jamaica Plain, and is supposed to have been planted between fifty and sixty years ago. The other has a tall, straight trunk, with a diameter of three feet one inch at three feet above the surface of the ground, and is growing on a farm near Houghton's Pond, in Milton, at the base of the southeastern slope of the Blue Hills."

That there should be hybrid walnuts is nothing strange or wonderful, and we often marvel that there should be so few of them in regions where two or more species are growing in close proximity in the same forest, or elsewhere, but from whence came these specimens in Massachusetts is somewhat of a mystery. We may safely conclude, however, that the hybridizing did not occur there, but somewhere else, and either the nuts or small seedling trees were introduced and planted where these hybrid specimens are now growing. It is possible that they are descendants of the old hybrid walnut tree of New York city, mentioned by Le Conte and Dr. Torrey, some one having sent nuts or seedlings to friends in Massachusetts, and the three trees described by Prof. Sargent are merely those which have survived until the present day, these retaining the hybrid characteristics of their parent. These hybrids may or may not possess any special economic value, but they are of considerable scientific interest, and for this reason alone are well worthy of careful preservation and extensive propagation.

Butternut Sugar.—It has often been claimed that sugar can be made from the native butternut tree, and while it is true that the sweetish sap flows readily from wounds made in this tree in early spring, the amount and quality of sugar to be obtained from it is scarcely worthy of serious attention. In my boyhood days butternut syrup and sugar were considered as "sticky jokes" of the sugar camp.

Hybrids in California.—Mrs. Ninetta Eames, writing, in the American Agriculturist, of new varieties of walnuts in California, refers to certain species and varieties growing in that State, as follows:

[228]
[229]

"On one of the avenues in Santa Rosa there are some dozen or so ornamental shade trees, which invariably attract the passers. It is not only that they are uncommonly beautiful, but that there is something unfamiliar about them. One unhesitatingly pronounces them 'walnuts,' from their unmistakable likeness to both the English walnut and the native species found growing along the streams of middle and southern California. They are, in fact, a cross between the Juglans regia and J. Californica, the wild black walnut of this State. In its appearance, this magnificent hybrid is nicely balanced between both parents, but it is superior to either of them in beauty and luxuriance of foliage, and in its phenomenal growth. There is, indeed, but one tree, the eucalyptus, that grows more rapidly. In speaking of this quality in the new walnut, Mr. Luther Burbank says: 'It often excels the combined growth of both parents, adding twelve to sixteen feet to its hight in one year. Given like conditions, a budded six-year-old hybrid is twice as large as a black walnut at twenty years of age.'

"The clean cut, bright green leaves make a remarkable showing, being all the way from two feet to a yard in length, and of graceful, drooping habit (Fig. 77). They are sweet-scented, too,—a delightful fragrance, resembling that of June apples. Another admirable feature of this hybrid walnut is its smooth, grayish bark, with white marblings not unlike the Eastern sugar maple. The wood is compact, with lustrous, satiny grain, and takes an elegant polish, which gives it unmistakable commercial value. Like the majority of hybrids, though blossoming freely it yields a scant crop of nuts, one or two annually on a single tree, and this only after twelve years of persistent barrenness. The seed, when planted, goes back to its parent distinctiveness,—one-half turning out to be English walnuts and the other[230]
[231] half black walnuts,—the true hybrid being only reproduced by grafting on a thrifty young Juglans Californica.

"Another handsome novelty in shade trees, is a hybrid from the Juglans nigra, or well-known Eastern black walnut, and J. Californica (Figs. 78 and 79). It makes a charming ornamental tree, and bears, in its season, a prolific crop of unusually large nuts, which have little value except in the eyes of school children. Several of these hybrids are growing in Santa Rosa, and present an interesting study to the pomologist.

"A still more unique species of the walnut genus is the Juglans Sieboldiana, a Japanese walnut which grows abundantly in the mountainous districts of the island of Yesso, and also in the more southern divisions of the empire. Several of these remarkable trees are to be found in the Kew gardens, but only one specimen is said to be growing in America, and this has recently come into profuse bearing on the Burbank experimental farm, eight miles from Santa Rosa, California. According to good authority, this Japanese walnut not only attains its greatest perfection in this favored climate, but it thrives equally well in countries too cold for the common walnut, J. regia. In its wild state in Japan, the Juglans Sieboldiana (whose curious raceme of nuts is shown in Fig. 80) makes a wide-spreading tree about fifty feet in hight, with pale, furrowed bark; nuts an inch and a half long, with a diameter one-third less, and a kernel having much the flavor of the common walnut. The tree bearing so thriftily on California soil, suggests its possible value as a marketable nut, while it already furnishes a remarkable addition to horticultural interests."

Juglans nigra, Linn. Black Walnut.—Leaflets eleven to seventeen, rarely more; ovate-lanceolate, smooth above, moderately pubescent beneath, pointed, somewhat heart-shaped at the base; leaf-stalks slightly downy, usually of a pale purplish color early in the season, especially on young trees; fruit large, mostly globose (Fig. 81); husk thin, roughly dotted; shell thick, hard, deeply and unevenly corrugated with rough, sharp ridges and points (Fig. 82); kernel large, sweet, but usually with a strong, rather rank taste, but less oily than the butternut. Trees grow to an immense size, with deeply furrowed bark; wood dark colored, valuable for cabinet work, inside finishing, gun stocks, etc. Common in deep, rich soils, from western Massachusetts west to southern Minnesota, and southward to Florida. Most abundant west of the Alleghany mountains, and especially in the rich valleys of the Western States distant from railroads and water communication; elsewhere the trees have long since been cut for their timber. I have only one synonym to record, and this is scarcely worthy of notice, viz.: Wallia nigra. (Alefeld in "Bonplandia," 1861.)

Varieties of the Black Walnut.—As with the butternut, there are no varieties of the black walnut in cultivation; at least, none propagated by means which will insure the perpetuation of their varietal characteristics. It is true that there are plenty of wild varieties to be found, these varying widely in size and form, and somewhat in thickness of their shell, as well as the ease with which the kernels may be extracted, but none of these have been perpetuated by artificial means. Among the earliest varieties recognized by botanists, one was called Oblong Black Walnut, Juglans nigra oblonga, by Miller, 1754, and perhaps in earlier editions of the "Gardener's Dictionary." He says this is from Virginia, and only a variety of the common black walnut. Marshall, in 1785, describes this "black oblong fruited walnut," and adds: "There are, perhaps, some other varieties." These oblong, or, more correctly speaking, oval nuts, often sharp-pointed at both ends, are rather plentiful at this time. There are rarely any considerable number of bushels reaching market from Virginia and adjacent States, among which these oval or oblong nuts cannot be found. I have a number before me measuring from one inch to one and a quarter in diameter, and from one and a half to nearly two inches in length. Other varieties found, perhaps, in the same lot, are broader than long, or one and seven-eighths inches broad, by one and one-half in vertical diameter. These measurements are of the cleaned shell, after the husks have been removed.

For several years a "thin-shelled black walnut" has been offered by at least two nurserymen, in whose catalogues they are described as "with unusually thin shells, the kernels coming out whole." I have endeavored to ascertain the origin of this variety, but failed, for both of the nursery firms who advertised the frees for sale admit that they do not know from whom they obtained the nuts planted, or where the original tree is growing. As the trees offered are only seedlings, there is no certainty that they will produce nuts with "thin shells." We can safely drop this supposed variety from the list until something definite is known about it.

Juglans Californica, Watson. California Walnut.—Leaflets in from five to eight pairs, more or less downy, but sometimes smooth, oblong-lanceolate, sharp-pointed, narrowing upward from near the base, two to two and a half inches long. Male catkins much larger than in our Eastern species, or from four to eight inches, often in pairs. Fruit round, slightly compressed, three-fourths to one inch and a quarter in diameter; husk thin, slightly dotted or roughened; shell dark brown, very faintly sculptured (Fig. 83), almost smooth, thick, the kernel filling two broad cavities upon each side; edible and fairly good. A tree or large shrub in the vicinity of San Francisco and along the Sacramento (where it is sometimes cultivated), growing to the hight of forty to sixty feet, and two to four feet in diameter; ranging southward to Santa Barbara, and eastward through southern Arizona to New Mexico and Sonora (Thurber, "Botany of California"). This species has been considered by some botanists as only a variety of the next, or Juglans rupestris, var. Major, Torrey. Scarcely hardy in the latitude of New York city, except an occasional seedling from nuts gathered along the northern limits of the species, or from the cooler elevated regions of the Pacific slope. It is of no special value, only adding one more edible nut tree to the list.

Juglans Rupestris, Engelmann. Texas Walnut. New Mexico Walnut.—Leaflets thirteen to twenty-five, smooth, bright green, small, narrow, and long-pointed; male catkins short, or about two inches long, and quite slender; fruit round or oblate; husk thin, nearly smooth; nut small, one-half to three-fourths of an inch in diameter; shell very thick, rather deeply furrowed, the narrow grooves on the greater part continuous from base to apex, the broad edges of the ridges smooth, not jagged as in the butternut and black walnut. Kernel sweet and good, but so small (Fig. 84) as not to be worth the trouble of extracting. A small and neat tree twenty to forty feet high, native of the bottom lands of the Colorado in Texas, and throughout the western part of the State, extending through southern and central New Mexico to Arizona. In New Mexico it reaches an elevation of seven or eight thousand feet, though the climate is often severe, the temperature dropping to zero and below during the winter. Seedlings raised from nuts obtained near the northern limits of this species in Texas and New Mexico would probably be hardy in most of the Northern States, but they are scarcely worth cultivating for their nuts, owing to the small size and thick shell; but as the trees are neat and graceful they are worthy of a place among other useful and ornamental kinds. An occasional bearing tree of this Texas walnut may be seen in the gardens and parks of the Eastern States, and probably in some of the Western, but I have no direct information in regard to their locations or age.

Synonyms:

Juglans rupestris, Torrey.
Juglans Californica, Watson, Bot. California.

Oriental Walnuts.—How few or many species of the walnut are indigenous to China, Korea, Japan and other Oriental countries it would be very difficult to determine, with our present limited knowledge of the forests of that part of the world. The few botanists who have had opportunities of studying the flora of those regions do not agree as to names or number of species of the genus. Loureiro, in his "Flora Cochinchinensis" (1788), names three species as indigenous to China, viz.: Juglans regia in the northern part, but this is now considered very doubtful; Juglans Camirium, Rhumphius, a medium-sized, heart-shaped nut, the trees found in the forests, and also under cultivation; Juglans Catappa, a large forest tree in the Cochin China mountains, with oblong, edible nuts, with husk and shell of nuts of a reddish color. Many years later Siebold describes a Japan walnut under the name of Juglans Japonica, and still later the Russian botanist, Maxiomowicz, renames this, in honor of Siebold, Juglans Sieboldiana, and describes another native of Japan as Juglans cordiformis. But prior to any of the authors named, Thunberg had described a Japan walnut under the name of Juglans nigra, probably the same as Loureiro's species, with reddish husk, but as this name had already been given to an American species it had to be dropped. Maxiomowicz also describes what he supposed to be a distinct species, found in the forests of Mandshuria under the name of J. Mandshurica (1872), but it is doubtful if it is anything more than one of the many wild forms of the species found widely distributed over eastern Asia. The red or black fruited walnut of Loureiro (J. Catappa), and Siebold's black walnut (J. nigra), are probably the same as the Ailantus-leaved (J. ailantifolia), recently described in Nicholson's "Dictionary of Gardening," London, Eng., 1884, the origin of which is said to be uncertain. It is Juglans Mandshurica, Maxim, in Alphonse LavallÉe's "Catalogue of Arboretum Segrezianum." As described in this work, the young fruit is violet-red, and produced in long pendulous clusters, the latter being one of the marked characteristics of these Oriental walnuts. But whether we admit that there is but one or a dozen species of these Eastern walnuts, it cannot be of any special interest to the practical nut culturist, for to him their economic and commercial value is of more importance than scientific nomenclature.

Up to the present time we have only succeeded in obtaining two species of these walnuts, or perhaps only one species and one variety; but we certainly have two distinct forms, both coming from Japan, and distributed under the names given them by Maxiomowicz, viz.:

Juglans Sieboldiana (Siebold Walnut).—Leaflets sessile, usually fifteen, five to seven inches long, oblong-pointed, thin, soft, downy, serratures very shallow, pale green above and somewhat lighter beneath; footstalks densely clothed with clammy hairs; fruit in long pendulous clusters of a half dozen to a dozen, one and a half inches or more long by a little more than one inch broad in the middle; husk thin, downy or clammy; nut somewhat compressed, the point usually bending to one side; shell smooth, with two shallow grooves from base upward on the sides opposite to the sharp, prominent ridges at the seams of the two lobes, the shell ending in a strong, sharp point (Fig. 85). The shell is very hard and thick; the kernel small, sweet, oily, resembling in taste our common butternut; tree a rapid and stocky grower, the coarse shoots and large leaves resembling those of the Ailantus tree at first, but soon spreading branches appear, forming an open, roundish head. The seedlings, as raised here, are abundantly supplied with small fibrous roots, which insures transplanting with safety. Apparently perfectly hardy in our Northern States, as I have heard no complaints of winter-killing of the young trees, although they are now widely distributed and in considerable numbers, but none, so far as I have been able to learn, have reached a bearing age here in the North.

Mr. P. C. Berckmans, of Augusta, Ga., in writing me under date of Dec. 3, 1894, says:

"Last year we fruited Juglans Sieboldiana trees four years from the seed. Fruit was produced in long clusters, and trees exceedingly ornamental, but this year these same trees were killed to the ground on the 26th of March, after they had set a crop of fruit and made a young growth of more than twelve inches. This untimely frost may not happen again in years, but it goes to show that many varieties of trees which are considered hardy further north, are sometimes destroyed here by spring frosts."

As these Japanese and Chinese walnuts are natives of cold climates they may be better adapted to the Northern than Southern States, but there is no locality entirely exempt from late spring frosts, as most farmers and fruit growers learned to their cost the past season. There can be little doubt of this species of walnut being the one described by Rhumphius under the name of J. Camirium, and more fully later by Loureiro, as already noted; but having come to us from Japan as Siebold's walnut, this name will answer as well as any other, even if it is not the proper one.

Juglans cordiformis, Maxim.—In foliage and growth of tree this is almost, if not absolutely, identical with the last; the difference observed is in the nuts, which are also produced in pendulous clusters. The form of the nut is almost round (Fig. 86), rather blunt-pointed, but the shell is deeply and unevenly furrowed, and indented somewhat like our black walnut; the ridges, however, are not as sharp. The specimens I have received from various sources are not as large as the Siebold, and the shell not quite as thick, but the kernel is small. I may note here that there appears to be some confusion in regard to this variety or species, for in several nurserymen's catalogues this form of nut is figured as Siebold's, and the one that I have described under that name is called Cordiformis. The specimens received from California, Japan, and also from Mr. Berckmans, correspond with the names here given, but further investigations may show that they should be reversed. The one I have received as Cordiformis is, doubtless, the nut described by Loureiro as J. Catappa, as an ovate-oblong nut, with a fibrous, leathery, reddish husk.

While I do not suppose that these Oriental walnuts will ever become of any considerable commercial value, they are worth planting for shade and ornamental trees. They are rather precocious, coming into bearing at an early age, and the nuts are not only edible, but will always be an acceptable addition to the unimportant although agreeable household supplies.

Persian Walnuts. Juglans regia, Linn. Royal Walnut, Madeira Nut, English Walnut, French Walnut, Chile Walnut, etc.—Leaflets five to nine, oval, smooth, pointed, slightly serrate; fruit round or slightly oval; husk thin, green, of a leathery texture, becoming brittle and cleaving from the nut when ripe and dry; nut roundish-oval, smallest at the top; shell smooth, with slight indentations, thin, two-valved, readily parting at the seams; kernel large, wrinkled and corrugated, the two lobes separated below with a thin, papery partition, but united at the top; sweet, oily, and generally esteemed.

This species has been in cultivation many centuries, and in different countries and climates, and under such variable conditions that many of the varieties have departed widely from the normal type. There are now an almost innumerable number of varieties, varying greatly in size and form. Some are not larger than a good-sized pea, as seen in the "Small Fruited Walnut" (Fig. 87), while others are nearly as large as a man's fist, as in the thick-shelled or "Gibbous Walnut" (Fig. 92), while in others the nut is greatly elongated, as in the "Barthere Walnut" (Fig. 88), and hundreds of other intermediate forms. There are also varieties that bloom early in spring, others late. Some are very hardy, others quite tender in cold climates. There are also dwarf and tall-growing, as well as the precocious and tardy fruiting varieties. But very few of these have ever been cultivated in our Eastern States, consequently little is known of their value here; but more may be in the near future, when our horticulturists and farmers begin to plant nut trees as freely as they have other kinds, or are awakened to the fact that such trees can be made a source of pleasure and profit.

Here in the Northern States our main dependence for hardy and productive trees of this species will be upon seedlings or cions from those acclimated specimens which have already been thoroughly tested and found to be both hardy and prolific. There are plenty of these, as I have stated elsewhere, and they are well worthy of attention and multiplication until something better is produced or discovered. In the meantime, the most promising European varieties could be imported and tested, although it is not probable that those originating in southern France and Italy would be of much value for planting in the latitude of New York city or north of it, but south of this line the chances of success would be somewhat greater; and to escape injury from late spring frosts, the more elevated regions are preferable to the lower and warmer anywhere in the Southern States. In anticipation of the question being asked, I will say that, at present, I do not know of any nurseryman in the Eastern States who propagates or imports named varieties of walnuts for sale. Of course, seedlings of these are offered, but it is well known that there is but a remote chance of these coming true from seed. Even the little dwarf French walnut PrÆparturiens, or Early Prolific, cannot be depended upon to produce dwarf or early bearing trees beyond the first generation from the nut, and these must be the product of grafted trees, to insure this much. The following list contains the names of only a few of the most noted varieties, the greater part having originated in Europe.

Ailantus-leaved walnut. See Oriental walnuts.

Barthere walnuts. See Fig. 88.—A very long nut, pointed at both ends. Shell thin; kernel large and of excellent flavor. Named after M. Barthere, a horticulturist of Toulouse, France, who discovered it growing among a number of other trees; consequently, its origin is a mystery. M. Barthere says that it is very productive, and even the seedlings of this variety begin to bear very early.

Chaberte.—An old standard French variety, of an oval shape; medium size, with very full and rich flavored kernel (Fig. 89). The tree buds and blooms late, therefore especially valuable in localities where late spring frosts are likely to occur.

Chile walnut.—This name is given, in a general way, to all the walnuts received in our markets from South America. The nuts are usually of good size, with a dark grayish shell; thin but firm, with plump kernels of excellent flavor. These nuts arrive in February and March. Many of the Chile walnuts have three valves (Fig. 90), instead of the normal two. Such freaks are occasionally found among the European varieties, also in the native hickories, but these tri-valved nuts appear to be very abundant among the Chile walnuts.

Cluster walnut. Racemosa or Spicata.—Described by Mr. Gillet as a variety of the Persian walnut, producing medium, thin-shelled nuts in long clusters of from eight to twenty-eight. He also says that he introduced it into this country, but from whence we are not informed. LavellÉe (1877) records it as a variety of J. regia, under the name of racemosa, giving its synonym as Juglans Californica of the horticulturists. I have not found it mentioned elsewhere.

Cut-leaved walnut.—A variety with deeply cut leaves; very ornamental, as seen in Fig. 91. Nuts quite small, but of good quality.

Franquette.—Another old standard French variety, with large, elongated-oval nuts with a distinct point. Shell thin; kernel large, and of rich flavor. The tree blooms late; valuable for planting in the South.

Gant or Bijou walnut.—A remarkable variety on account of its extraordinary size. The shell is thin, with rather deep furrows, those of the largest size being made into ladies' companions, where to stow away gloves or handkerchiefs, hence the name "Gant" walnut. The kernel, though, does not correspond to the size of the shell (Gillet).

Gibbous walnut (Fig. 92).—This is a very large variety, supposed to be a hybrid, raised in France many years ago. It is of little value, as the shell is very thick and kernel small. Valuable mainly for its immense size.

Kaghazi.—This is supposed to be a variety of the Persian walnut, of fair size, with a very thin shell. The tree blooms very late in spring, and for this reason is recommended for localities where there is danger from injury by frost. The tree is said to be a very rapid grower, and much more hardy than the general run of varieties of this species. I have been unable to learn its origin, but it has been planted quite extensively in California, and some of our Eastern nurserymen are offering the seedling trees for sale, but whether they will possess the merits of the original or not must be determined by experience.

Large-fruited PrÆparturiens.—A sub-variety of the PrÆparturiens, originating with Mr. Felix Gillet of California.

Late PrÆparturiens.—Also originated with Mr. Gillet. Valuable because the trees bloom late in spring. Nuts described as of medium size, but with full kernels of excellent quality.

Mayette.—Very large (Fig. 93), with a light-colored shell of moderate thickness. Kernel plump, readily extracted whole, as shown in Fig. 94, sweet, and a rich, nutty flavor. Tree blooms late and is very productive. An old and standard French variety.

Mesange or Paper-shell.—This nut has the thinnest shell of any variety known; it derives its name of Mesange from a little lark of that name, that goes to the kernel through the tender shell. Tree very productive, and the kernel quite rich in oil. We do not, however, recommend the growing of this variety for market, on account of the thinness of the shell, which breaks off too easily in handling the nuts, or even when they drop on the ground (Felix Gillet).

Meylan Walnut.—A French variety that originated near the little village of Meylan, in the vicinity of which it is quite extensively cultivated for home use and export.

Octogona.—Of uncertain origin, but very much resembles one of the Oriental species in the form and sculpture of the shell (Fig. 95). The shell is also very thick, as shown in the cross section (Fig. 96). Of no special value.

Parisienne Walnut.—Although this was named for the city of Paris it did not originate there, but in the South of France. It is a large and rather broad variety, with a firm but thin shell (Fig. 97) and excellent flavored kernel. It is reported that this variety succeeds in California, also in the South wherever tried. The trees leaf out late in spring and are rarely injured by frosts, and are remarkably productive.

PrÆparturiens. Precocious Dwarf Prolific.—A French variety of a dwarf habit, and the plants noted for bearing when very young. A correspondent of The Garden (London, Eng.), referring to this variety some years ago, says:

"It is precocious on account of the singular and exceptional fact that it is born almost an adult; in fact, it is nothing uncommon to see a tree in its third year bearing excellent fruit."

He does not say, however, whether he refers to seedlings or grafted plants, but we may presume the latter or those raised from layers, for cultivators who have experimented with seedlings have found that they possess a strong tendency to revert to the original or tree form. This may not show itself very strongly in the first generation if the nuts are obtained from grafted trees of some age, but in the second and third generation the early-fruiting and dwarf are usually entirely lost. The only certain way of securing the true variety is by grafting or layering, but it is to be feared that very few trees propagated by these modes are in cultivation, at least in the Eastern States, although nurserymen have been offering PrÆparturiens walnut trees in their catalogues during the past fifty years. In one now before me, published in New York city in 1844, trees of this walnut are offered at one dollar each, or about what is charged for seedlings at the present time. As nothing is said in the catalogues about the mode of propagation, we infer that they are seedlings, as grafted trees would be worth more than one dollar. The nuts of this dwarf walnut are of medium size, thin-shelled and of excellent flavor; valuable for gardens of limited extent.

Serotina. Late Walnut, St. John Walnut.—A very peculiar sort, inasmuch as it is the latest of all to bud and bloom in spring, and yet it pushes forward so rapidly that the nuts are ripe with others in the fall. They are of medium size (Fig. 98), with a rather hard shell, but the kernel is plump and good flavored. The tree is very productive, and sure to escape late spring frosts.

Vilmorin.—This is claimed to be a hybrid between some variety of J. regia and our native black walnut, J. nigra. Scarcely known outside of France.

Vourey.—A new and splendid variety raised near Vourey, a small town in southeast France. It has much the same shape and qualities of the Parisienne walnut (Gillet).

Variegated walnut.—A handsome variety, with young branches covered with dark-green bark spotted with gray, and often striped longitudinally with yellow. The leaves resemble those of the common walnut; the fruit is of a light yellowish-green streaked with darker green, and reminds one closely of certain varieties of pears which, in common with this variety, frequently have their young branches striped in a similar manner. Propagated by grafting or layers. (The Garden.)

Weeping walnut.—A tree with pendulous twigs and branches. Quite ornamental, but not especially valuable for its fruit. Hardy in England.

In addition to those described, there are a large number of varieties, which may be worth importing and testing in this country, by those who may feel inclined to make experiments with these nuts. Probably some of those highly extolled by earlier writers are now lost, but this cannot be determined until a careful search through the old European gardens has been made.

Among the early-fruiting or precocious varieties we find an account of one raised by Anthony Carlisle, of England, as recorded in a paper read at a meeting of the Horticultural Society of London, March 3, 1812. Mr. Carlisle planted six nuts in March, 1802, these having been received from Mr. Thomas Wedgewood of Blandford. Six years later, or in 1808, one of the seedlings bore and matured ten walnuts, and the next season (1809) upwards of fifty, and in 1810 one hundred and twelve, the tree at that age being nineteen feet seven and one-half inches high. Another variety, under the name of Highflyer walnut, is described in the Transactions of the same society, Vol. IV, 1822, p. 517. The nuts sent to the society were grown in the town of Thetford, and are described as a long oval, with a shell so very thin that the slightest pressure of the fingers crushes it. I find that this Highflyer walnut is mentioned in the recently published "Dictionary of Gardening," but whether obtainable in English nurseries or not we are left in doubt.

I refer to these English varieties mainly to show that some of the very best and thinnest-shelled walnuts have been grown in cool climates, and are not confined entirely to the warm or semi-tropical, as many persons seem to suppose and even claim to be the fact. It is principally from these English walnuts, as they are usually termed, that our hardy old-bearing trees, referred to elsewhere, have been produced, and, doubtless, many more will be, when we begin to pay some attention to this very valuable nut. It is also quite likely that when our horticulturists look about for choice acclimated varieties for propagation, they will be found right here in the grounds of next-door neighbors, and there may be no necessity of sending to Europe or elsewhere for either nuts or trees.

At present there is much confusion and uncertainty in regard to the identity and nomenclature of both species and varieties of the walnut, and it must remain so until they are collected from all countries and climes, of which they are either native or into which they have been introduced, and when so collected, and fruiting specimens produce, it will not be difficult to classify and determine their synonyms. This will be an undertaking scarcely to be expected of the individual nut culturist, but is within the legitimate line of the arboretum, and of public botanical gardens located in both cold and warm climates, thereby securing a division of labor, and at the same time avoiding the uncertainty of trying to produce practical results under uncongenial conditions and surroundings.

Husking Walnuts.—The husks of nearly all the varieties of the Persian and Oriental walnuts part from their shells freely when fully ripened and dried, but in a few varieties the husks are rather persistent, requiring force and friction for their removal. This may be accomplished by placing them in bags and shaking, or in barrels and rolling, until the nuts are scraped clean. But the better way, where there is any considerable quantity of nuts to be operated upon, is to take a strong barrel or cask, and so arrange it on standards that it can be rapidly revolved with a crank attached to one end. Of course, the cask must have its two heads left in place, and an opening made in the side to admit the nuts and remove them when cleaned. Almost any man handy with tools can make such a cleaner and polisher in a few hours, and if stored in a dry place it will last for several years. With butternuts and black walnuts the husks are much tougher, and they should be thrown into heaps in the open air, and turned over occasionally until the husks become softened sufficiently to permit of their removal, in case they are to be sent to market. Ordinary threshing machines may be used for cleaning the husks from black walnuts, by removing about one-half the teeth, or enough to allow the nuts to pass through without breaking their shells.

Most of the hickories drop from the husk, leaving the nut clean; but in some varieties of the pecan the inner part of the husk adheres rather tenaciously, and they sell better if cleaned; besides, some have rather rough and thick shells, and a little scraping and polishing adds much to their appearance. The revolving cask, either worked by hand or other power, is an excellent implement for preparing these nuts for market, and if the husk is very persistent, a little dry sand thrown in will aid in cleaning and polishing. Sometimes these nuts are subjected to what is called the soapstone polish, leaving the shells very smooth, with a greasy feel. The French walnuts, which are extensively imported under the general name of Grenoble walnuts, are usually bleached with sulphur before they are shipped, and while this adds nothing to the quality of the kernel, the sulphur is an excellent insecticide and fungicide, and may be of some use on that account; but otherwise it is likely to be more injurious than beneficial. As bleaching both walnuts and almonds is often insisted upon by dealers, I give the process suggested by Director Hilgard, of the California Agricultural Experiment Station, which he believes will prove more satisfactory than the one usually employed, and is as follows:

"The nuts, placed in small baskets (such as the Chinese use for carrying), are dipped for about five minutes in a solution containing to every fifty gallons of water six pounds of bleaching powder and twelve pounds of sal soda. They are then rinsed with a hose, and after draining, again dipped into another solution containing one per cent of bisulphite of lime; after the nuts have assumed the desired tint, they are again rinsed with water and then dried. Instead of the second dipping, the nuts may be sulphured (fumigated) for ten or fifteen minutes. The cost of fifty gallons of chlorine dip will be about forty cents; the same bulk of the bisulphite dip, probably considerably less. The time occupied in handling one batch (two dips) is from twelve to fifteen minutes."

Insect Enemies.—The walnut is attacked by the same kinds of insects that infest the hickories, with, perhaps, a few exceptions; as, for instance, the bark beetles and the nut weevils. The leaves appear to be more or less acceptable food for the caterpillars that feed on the hickories, and the same insecticides and means employed for destroying these pests on one will answer for the other.

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The caterpillars of some of the smaller kinds of moths are, as a rule, far more destructive to the leaves than the larger, and their ravages often escape notice until it is too late for the use of preventives, or for their destruction with insecticides.

Ever since I became connected with the New York city press, some thirty odd years ago, scarcely a season has passed during which one or more specimens of the Regal walnut caterpillar (Citheronia regalis), shown in Fig. 99, have not been received from some correspondent who had found them crawling down the stem or on the ground near a walnut tree. Such a large caterpillar would naturally attract the attention of almost any person, but to the timid its appearance is exceedingly ferocious and repulsive, while to the entomologist it is a beautiful and interesting creature, and far more likely to be handled with care than injured. This caterpillar is of a green color, and transversely banded across each of the rings with pale blue. The head and legs are of an orange color, also the long spine or horns, with the points tipped with black. It is certainly very formidable in appearance, but perfectly harmless, and may be handled with impunity. The parent moth (Fig. 100) has fore wings of an olive color, ornamented with small yellow spots and veined with red lines. The hind wings are orange-red, with two large irregular yellow patches before, and a row of wedge-shaped olive colored spots between the veins behind. Although this insect appears to be widely distributed over the country, and the caterpillars feed on the walnuts and occasionally on the hickory, it has never been known to be sufficiently numerous to attract any special attention.

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