SILVERBELL TREE
(Mohrodendron Carolinum)

This tree belongs to the storax family, which is not a very numerous family as forest families are generally counted, but it is old and highly respectable. Its members are found in the old world and the new in both North and South America, in Europe, Asia, and the Malay Archipelago. Trees of the storax family produce, or they are supposed to produce, resins and gums, balsams, and aromatic exudations, but some give little or none. The priests and soothsayers of idolatrous nations of ancient times laid great stress on storax. They insisted on having the resin as an adjunct to their superstitious rites. It was the incense offered in their worship, and they compassed sea and land to obtain it for that purpose. It is not improbable that the southern peninsulas of Asia and the far-off Molucca islands were visited in ancient times to procure the incense which ultimately found its way to the Mediterranean regions.

It is, therefore, interesting to find that two members of the old storax family are quietly living in the coast region and among the mountains of the southeastern part of the United States. No one has ever suspected that they might be capable of yielding resinous incense suitable for the altars of heathen gods. They are the silverbell tree, and its little cousin, the snowdrop tree (Mohrodendron dipterum). They have had common names a long time, but their botanical names are the result of a recent christening. They are named from Charles Mohr who wrote an interesting book on the flora of Alabama. The silverbell tree is the larger of the two and deserves first consideration.

It has a somewhat extensive range, but in some parts it is so scarce that few persons ever see it. It is found from the mountains of West Virginia to southern Illinois, south to middle Florida, northern Alabama, and Mississippi, and through Arkansas and western Louisiana to eastern Texas. Under cultivation, this tree is known as the snowdrop tree in Rhode Island, Pennsylvania, North Carolina, South Carolina, Florida, and Louisiana. In Rhode Island, under cultivation, it is also sometimes known as the silverbell tree, and bears the same name in Alabama, Florida, and Mississippi. In parts of Tennessee it is known as the wild olive tree, and in other parts of the state as the bell tree. In various localities in Alabama it is referred to as the four-winged halesia; and in others as opossumwood. It is indiscriminately known in various sections of Texas as the rattlebox and calicowood, and some of the furniture manufacturers in North Carolina list it as box elder, though it is only distantly related to the true box elder. In the Great Smoky mountains in Tennessee, where the species reaches its greatest development, it bears a variety of names, among them being tisswood, peawood, bellwood, and chittamwood.

The tree varies in size from a shrubby form so small that it is scarcely entitled to the name of tree, up to a height of eighty, ninety, and even more than 100 feet with diameters up to nearly four feet. The largest sizes occur only among the ranges of the Great Smoky mountains in Blount, Sevier, and Monroe counties, Tennessee. No reason is known why this tree in that region should so greatly exceed its largest dimensions in other areas; but most species have a locality where the greatest development is reached, and this has found the favorable conditions in the mountains of eastern Tennessee. Some of the trees measure sixty feet or more to the first limbs.

Lumbermen of the country are not generally acquainted with silverbell, as is natural since its commercial range is so limited. It is not listed in statistics of sawmill cut or of veneer mills. The wood-using industries of the country do not report it, except in the one state, North Carolina, and there in very small amounts. Doubtless, it is occasionally used elsewhere, but it escapes mention in most instances. It has been made into mantels at Knoxville, Tennessee, and passes as birch.

The wood is light, soft, usually narrow-ringed, color light brown, the thick sapwood lighter. It weighs thirty-five pounds per cubic foot, and when burned it yields a low percentage of ash. The wood’s chief value is due to its color and figure. Best results are not obtained by sawing the logs into lumber, because the handsomest part of the figure is apt to be lost. It is preËminently suited to the cutting of rotary veneer. By that method of conversion the birdseye and the pitted and mottled effects are brought out in the best possible manner. Veneers so cut from logs selected for the figure, possess a rare beauty which no other American wood equals. There is a pleasing blend of tones, which are due to the direction in which the distorted grain is cut. This distinguishes the wood from all others and gives it an individuality. Much of the figure appears to be due to the presence of adventitious buds, similar to those supposed to be responsible for the birdseye effect in maple.

The leaves of silverbell are bright green at maturity and are from four to six inches long and two or three wide. They turn yellow before falling in autumn. The flowers give the tree its name, for they resemble delicate bells, about one inch in length. They appear in early spring when the leaves are one-third grown, on slender, drooping stems from one to two inches long. The trees are loaded throughout the whole crown, and present an appearance that is seldom surpassed for beauty in the forests of this country.

The fruit is peculiar and is not particularly graceful. It has too much the appearance of the load carried by a well-fruited vine of hops. It ripens late in autumn and persists during most of the winter. There is nothing in its color, shape, or taste to tempt birds or other creatures to make food of it, though, under stress of circumstances, they may sometimes do so. The fruit is two inches or less in length and an inch wide, and has four wings, which seem to be practically useless for flight. The seed is about half an inch long.

The bark of the trunk is bright red-brown and about half an inch thick, with broad ridges which separate on the surface into thin papery scales. The young branches wear an early coat of thick, pale wool or hairs, light, reddish-brown during the first summer, but later changing to an orange color.

The botanical range of the species is extensive, though the tree-form is confined to a few counties among the southern Appalachian mountains. The northern limit of its range is in West Virginia where it is so scarce that many a woodsman never recognizes it. Unless it is caught while in the full glory of its bloom, it attracts no attention. It is not there a tree, but a shrub, hidden away among other growth, along mountain streams or on slopes where the soil is fertile. The blooming shrub might, at a distance, be mistaken for a dogwood in full blossom, but a closer inspection corrects the mistake.

It is true of this species as of many others that the range has been greatly extended by planting. The bell-like white flowers early drew attention of nurserymen who were on the lookout for trees for ornamental planting. It was carried to Europe long ago, and graces many a yard and park in the central and northern countries of that continent. It now grows and thrives in the United States six hundred miles northeast of its natural range, where it endures the winters of eastern Massachusetts, blooms as bounteously as in its native haunts among the shaded streams of the Alleghany mountains.

Snowdrop Tree (Mohrodendron dipterum) is a near relative of the silverbell tree, and looks much like it, except that it is smaller, has larger leaves, and the flowers are creamy-white. The two occupy the same territory in part of their ranges, but they differ in one respect. The silverbell tree grows with great luxuriance among the mountains while the snowdrop tree keeps to the low country and is seldom or never found growing naturally at any considerable elevation. It prefers swamps or damp situations near the coast. While the silverbell tree’s range includes West Virginia, that of the snowdrop extends no farther north than South Carolina. It follows the coast to Texas, and runs north through Louisiana to central Arkansas. Its range has been greatly enlarged by planting, and the northern winters do not kill it on the southern shores of Lake Erie. The largest trees are about thirty feet high and six inches in diameter, but the growth in most places is shrubby. Leaves are four or five inches long and three or four wide. Flowers are one inch long and are borne in profusion. They constitute the tree’s chief value as an ornament, though the foliage is attractive. The bloom lasts a month or six weeks, from the middle of March till the last of April. The fruit has two wings instead of four, as with silverbell, but occasionally two rudimentary wings are present. The wood is light, soft, strong, color light brown, with thicker, lighter sapwood. The smallness of the trunks makes their use for lumber impossible. The species is valuable for ornamental purposes only, and has been planted both in this country and Europe. It has a number of names by which it is known in different localities, among them being cowlicks in Louisiana, and silverbell tree in the North where it has been planted outside of its natural range.