The following species, belonging to those sections of Microscopic Fungi which are included in this volume, have been found in Britain since the publication of the preceding Appendix:—

Peridermium columnare, Alb. and Schw. Simple, slender, naked, cylindrical, elongated, lacerated at the apex, white; sporidia orange.—On Picea. Watcombe, near Torquay. September, 1867. (E. Parfitt.)

Æcidium Orchidearum, Fiedl. Orchis Cluster-cup; spots large, pallid, orbicular or elongated; peridia circinating, semi-immersed; spores golden-yellow.—On Orchis latifolia. Dilham, Norfolk. June, 1866.

Puccinia discoidearum, Link. Southernwood Brand; spots obliterated; sori subrotund, minute, surrounded by the ruptured epidermis; sporidia brown, oblong or ovoid, somewhat rhomboidal, with both cells attenuated, and triangular; peduncles elongated.—On Artemisia maritima. Swanscombe Marshes. 1865.

Puccinia VirgaureÆ, Lib. Golden-rod Brand; spots orbicular, pallid, then yellowish; sori blackish-brown, minute, punctiform, shining, clustered, nearly stellate, convex; sporidia oblong, subconstricted, yellowish-brown above, attenuated and yellowish-white below; peduncles short.—On leaves of Solidago virgaurea. Shere, Surrey. July and August, 1865. (Dr. Capron.)

Puccinia difformis, Kunze. Goosegrass Brand; spots yellowish; sori variable, compact, often in rings; epidermis bullate; sporidia obovate, obtuse, on short pedicels, brown.—On leaves of Galium aparine. July, 1866. Shere and Darenth Usually occurring on or near spots previously occupied by Æcidium.

Puccinia Apii, Corda. Celery Brand; sori large, confluent, red-brown, powdery; spores oblong, constricted, brown; epispore smooth, thick; pedicels short, attenuated.—On leaves of Celery. Autumn, 1866, 1867.

Puccinia Asari, Kunze. Asarabacca Brand; spots obliterated; sori small, subglobose, crowded or circinating, ultimately confluent, surrounded by the ruptured epidermis, usually forming a large, roundish, convex, pulverulent mass; sporidia brown, elliptic, constricted.—On leaves of Asarum EuropÆum. Bettws-y-coed, N. Wales. July, 1866.

Puccinia MoehringiÆ, Fuckel. It is very doubtful whether this deserves to rank as a species distinct from P. Lychnidearum, Lk. I think not. The sporidia are rather shorter than in the last-named species, and the pedicels are very long; otherwise it does not appear to differ from the typical form.—On Moehringia trinervis. Near Worcester. June, 1867. (Dr. Holl.)

Puccinia fallens, Cooke. Vetch Brand; sori few and small, scattered, intermixed with pustules of Trichobasis; sporidia obovate, on rather long pedicels, of a tawny colour, and slightly constricted at the septum; epispore smooth.—On leaves of Vicia sepium. Liverpool. Autumn, 1865. (R. McLeod.)

Uredo Orchidis, Mart. Orchis Uredo; amphigenous; spots reddish-brown; sori subrotund, arranged in circles, often confluent; sporidia subglobose, golden-yellow.—On Listera ovata and Orchis latifolia. Crosby, near Liverpool. May, June, 1865. (R. G. McLeod.)

Uredo Empetri, D.C. Crowberry Uredo; hypogenous; spots obliterated; sori oval, scattered: the epidermis at first convex, afterwards ruptured and concave; sporidia ovoid or subglobose, bright yellow.—On Empetrum nigrum. Near Llanderfel, N. Wales. May, 1865.

Uredo Euonymi, Mart. Spindle Uredo; spots yellowish; sori roundish, circinating, often confluent; epidermis erumpent; sporidia ovoid and slightly coherent, tawny-yellow.—On leaves of Euonymus EuropÆus. Darenth Wood, Kent. August, 1864. Rare.

Uredo TropÆoli, Desmz. Nasturtium Uredo: hypogenous; spots pale-yellow; sori minute, roundish, scattered or confluent; sporidia ovoid or subglobose, orange.—On leaves of TropÆolum aduncum. Shere. October, 1865. (Dr. Capron.)

Trichobasis fallens, Cooke. Clover Rust; spots obliterated; sori amphigenous, numerous, scattered, subrotund, brown, surrounded by the remains of the ruptured epidermis; spores sub-ovate; pedicels short, hyaline, evanescent; epispore verrucose. Uredo fallens, Desmz.—On leaves of Clover, &c. September. Not uncommon.

Uromyces graminum, Cooke. Cocksfoot Rust; epiphyllous; sori oblong or confluent and linear, convex, black and shining, so as easily to be confounded on casual observation with Dothidea graminis, at length bursting longitudinally; sporidia subglobose or ovate, tawny, with hyaline pedicels of variable length.—On leaves of Dactylis glomerata. Shere. October, 1865. (Dr. Capron.)

Uromyces concentrica, LÉv. Described at p. 208 as Trichobasis Scillarum, B.; but it appears to be a good Uromyces, and has been placed in that genus by LÉvielle.

Uromyces sparsa, LÉv. Sandwort Rust; spots pallid; sori subrotund and oval, amphigenous and cauline; epidermis erumpent; sporidia ovoid, brownish; peduncles thickened, short.—On Spergularia rubra. Swanscombe Marshes. June, 1865.

Uromyces Polygoni, Fuckel. Knotgrass Rust; cauline; sori elongated and confluent, convex, surrounded by the remains of the ruptured epidermis; sporidia subglobose or globose, smooth, yellowish-brown; pedicels very long, thickened, hyaline, persistent. Capitularia Polygoni, Rabh.—On the stems of Polygonum aviculare. October. Common.

Cystopus spinulosus, De Bary. Thistle (White) Rust; conidia in time much elongated; sori erumpent on both surfaces of the leaves, white; oospores globose; epispore brown; tubercles minute, solid, very prominent, often acute and spinulose.—On Thistles. Bungay, Suffolk. September, 1865.

Peronospora candida, Fuckel. Primrose Mould; densely cÆspitose, white; threads erect, dichotomously branched; ultimate branchlets short, spreading; sporidia ovate.—On leaves of Primrose. Near Corwen, N. Wales. July, 1866.

PodosphÆra, Kunze.

Mycelium effuse, web-like, evanescent; conceptacles sphÆrical, containing one subglobose 8-spored sporangium; spores ovate; appendages few, dichotomous, thickened at their extremities, hyaline.

PodosphÆra Kunzei, LÉv. Plum Blight; amphigenous; conceptacles minute, scattered, globose; appendages three times the length of the diameter of the conceptacles.—On leaves of Prunus domestica. Shere, Surrey. Sept., 1865. (Dr. Capron.)

PodosphÆra clandestina, LÉv. Hawthorn Blight; amphigenous; conceptacles minute, globose, scattered; appendages (8-10) equal in length to the diameter of the conceptacles; branches short and rounded at their extremities.—On leaves of the Hawthorn. Upper Holloway. October, 1864; Shere, Surrey, September, 1865. (E. C.)

Uncinula Wallrothii, LÉv. Sloe Blight; amphigenous; mycelium web-like, evanescent; conceptacles minute, scattered; sporanges 12-16, pear-shaped, 6-spored; appendages numerous, twice the length of the diameter of the conceptacles.—On leaves of the Sloe, Prunus spinosa. Shere, Surrey. October, 1865. (Dr. Capron.)

MicrosphÆria comata, LÉv. Spindle Blight; hypophyllous; mycelium web-like, fugacious; conceptacles scattered, minute, globose; sporanges 8, ovate, with a beak-like termination at their base, 4-spored; appendages few, six times the length of the diameter of the conceptacles.—On Euonymus EuropÆus. Shere, Surrey. August, 1865. (Dr. Capron.)

Erysiphe horridula, LÉv. Borage Blight; amphigenous; mycelium web-like, sometimes persistent; conceptacles minute, globose, scattered or clustered; sporanges 20-24, oblong-ovate, attenuated downwards, containing 3-4 spores; appendages short, flexuose, and bent upwards.—On leaves of Lycopsis arvensis. Shere. October, 1865. (Dr. Capron.)

ChÆtomium murorum, Corda. Wall Bristle-mould; gregarious, glaucous, then blackish; perithecium globose, brown; hairs circinate, erect, septate, pulverulent; spores oblong, yellowish. On plaster. Rare. (M. J. B.)