210 MICEOSCOPIC FUNGI. 



Trichobasis suaveolens, Lev. Thistle Rust; spots 

 obliterated, yellow on the opposite side; sori subrotund, nearly 

 plane, scattered, at leng^th confluent, on the under surface, sur- 

 rounded by the ruptured epidermis ; spores globose, brown.— On 

 leaves of Thistles, frequently covering the wliole under surface. 

 Summer. Common. (Plate VII. figs. 151 — 153.) 



Trichobasis Polygonorum, B. Knotgrass Rust ; spots 

 red-yellow, widely effused; sori subrotuud, scattered, sometimes 

 forming a ring, epidermis at length bursting ; spores somewhat 

 obovate, brown. — On Polygonum, avieulare, amphibium^ and other 

 species. July to September. Common. 



Trichobasis Vincse, B. Periwinkle Rust ; spots yellow- 

 ish; sori small, subrotund, and oval, on the under surface, sur- 

 rounded by the ruptured epidermis ; spores oval, rather ovoid, 

 brown. — On leaves of Finca major. May and June. (Plate YI. 

 fig. 130, 131.) 



Trichobasis Geranii, B. Geranium Rust ; spots yellow- 

 ish ; sori subrotund, nearly plane, scattered or confluent ; spores 

 subglobose, brown. — On various species of Geranium. 



Trichobasis ViolarunijB. YioletRust ; spots yellowish ; 

 sori subrotund, scattered, generally on the under surface ; epi- 

 dermis ruptured, persistent; spores subglobose, brown. — On leaves 

 and petioles of Violets. July. Kot uncommon. 



Trichobasis Parnassise, 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 Farnassia 

 pahistris. Irstead, Norfolk. September, 1864. 



Trichobasis Epilobii, Berk. Willow-herb Rust ; spots 

 yellowish ; sori subrotund, scattered, surrounded by the ruptured 

 epidermis, often on the under surface ; spores subglobose, brown. 

 — On Epilobium montanum, &c. June and July. 



Trichobasis Rhamni, Cooke. Buckthorn Rust ; seated 

 on definite yellowish spots ; sori occurring only on the under 

 surface of the leaves, scattered or collected in clusters, very 

 minute, roundish, or oblong ; spores at length rusty brown, sub- 

 globose.— On Rhamnus catharticus. Selsdon, Surrey. September 

 16, 1864. {A. Grugeon) 



Uromyces, Lh. 



Spores unilocular, attached permanently to a decided peduncle 

 of greater or less length.— j5^r/t. Otdl.t p. 333. 



