Trichobasis, Lév.
Spores free; attached at first to a short peduncle, which at length falls away.—Berk. Outl., pp. 332.
* Spores yellow.
Trichobasis rubigo-vera, Lév. Round Corn Rust; spots yellow, heaps oval, scattered, generally on the upper surface; epidermis at length bursting longitudinally; spores subglobose, reddish-brown, easily dispersed.—On Grasses and Corn. Throughout the Summer. Very common. ([Plate VII.] figs. 140-142.)
Trichobasis linearis, Lév. Long Corn Rust; spots yellow-brown. Sori elliptic, then elongated and linear; epidermis bursting; spores oblong or globose, yellow.—On leaves and sheaths of Corn and Grasses. Summer. Common. [Plate VII.] figs. 143, 144.)
Trichobasis Glumarum, Lév. Glume Rust; sori minute, round, scarcely convex, subgregarious, often confluent. Spores globose or subovoid, orange, not pedicellate; epispore smooth.—On the glumes of Cereals. August.
Trichobasis Symphyti, Lév. Comfrey Rust; Sori minute, very numerous, scattered, roundish, then confluent; epidermis ruptured, scarcely conspicuous around the margin; spores subglobose, pallid orange.—On Comfrey.
Trichobasis Pyrolæ, B. Wintergreen Rust; spots yellowish-brown on the opposite side; sori globose, minute, scattered or aggregate, on the under surface; epidermis generally closed; spores subglobose, yellow.—On Pyrola rotundifolia, &c.
Trichobasis Petroselini, B. Parsley Rust; spots yellowish; sori subrotund and oval, confluent, on both surfaces; epidermis at length ruptured; spores globose or subglobose, occasionally obsoletely pedicellate, pale yellow.—On various Umbelliferæ.
Trichobasis Senecionis, B. Groundsel Rust; spots obliterated; sori solitary or regularly crowded, subrotund and oval, on the under surface, surrounded by the ruptured epidermis; spores subglobose, orange.—On various species of Groundsel. July. Very common. [Plate VII.] figs. 145, 146.)