Trichobasis Hydrocotyles, Cooke. Flukewort Rust; without definite spots; sori chiefly on the upper, sometimes on the under surface, scattered, variable, roundish, erumpent, surrounded by the ruptured epidermis; spores subglobose, at length brown; epispore rough with minute tubercles.—On Hydrocotyle vulgaris. Epping, July to September, 1863 and 1864. ([Plate VIII.] figs. 168, 169.)
Trichobasis Betæ, Lév. Beet-leaf Rust; spots yellow; heaps subrotund and oval, scattered and concentric, on the upper surface; epidermis at length bursting; spores subglobose, shortly pedicellate, brown.—On the leaves of Beet. August and September. Common.
Trichobasis Fabæ, Lév. Bean Rust; spots obliterated; sori subrotund and oval; bullate, scattered and aggregate, surrounded by the ruptured epidermis; spores ovoid, brown.—On Beans. August and September. Common.
Trichobasis Galii, Lév. Bedstraw Rust; spots yellowish; sori subrotund, aggregate, closed; spores globose, reddish.—On Galium verum, saxatile, &c. July and August.
Trichobasis suaveolens, Lév. Thistle Rust; spots obliterated, yellow on the opposite side; sori subrotund, nearly plane, scattered, at length confluent, on the under surface, surrounded by the ruptured epidermis; spores globose, brown.—On leaves of Thistles, frequently covering the whole under surface. Summer. Common. ([Plate VII.] figs. 151-153.)
Trichobasis Polygonorum, B. Knotgrass Rust; spots red-yellow, widely effused; sori subrotund, scattered, sometimes forming a ring, epidermis at length bursting; spores somewhat obovate, brown.—On Polygonum aviculare, amphibium, and other species. July to September. Common.
Trichobasis Vincæ, B. Periwinkle Rust; spots yellowish; sori small, subrotund, and oval, on the under surface, surrounded by the ruptured epidermis; spores oval, rather ovoid, brown.—On leaves of Vinca major. May and June. ([Plate VI.] fig. 130, 131.)
Trichobasis Geranii, B. Geranium Rust; spots yellowish; sori subrotund, nearly plane, scattered or confluent; spores subglobose, brown.—On various species of Geranium.
Trichobasis Violarum, B. Violet Rust; spots yellowish; sori subrotund, scattered, generally on the under surface; epidermis ruptured, persistent; spores subglobose, brown.—On leaves and petioles of Violets. July. Not uncommon.
Trichobasis Parnassiæ, Cooke. Grass of Parnassus Rust; on both surfaces of the leaves; sori at first bullate, at length rupturing the epidermis, scattered, often confluent; spores globose or nearly so, rather large, tawny brown.—On Parnassia palustris. Irstead, Norfolk. September, 1864.