226 MICROSCOPIC FUNGI. 



Trichobasis Galii, Lev. Bedstraw Rust ; spots yeliow- 

 ish ; sori subrotund, aggregate, closed ; spores globose, reddish. 

 — On Galium vertan, saxatile, &c. July and August. Uredo 

 spores of Puccinia galiorum. 



Trichobasis fallens, Cooke. Cloyeh Rust ; spots obli- 

 terated ; 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, Uredo spores oi Puccinia fallens. 



Trichobasis suaveolens, Lev. Thistle Rust; spots 

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

 plain, scattered, at length confluent, on the under surface, sur- 

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

 leaves of Thistles, frequently covering the whole under surface. 

 Summer. Common. (Plate V\l. 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 avicidare. amphibium, and other 

 species. July to September. Common. Uredo spores of 

 Puccinia Polygonorum. 



Trichobasis Vincss, 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 Vinca major. May and June. Uredo 

 spores of Puccinia Vinca. (Plate VI. rigs. 130, 131.) 



Trichobasis Violarum, B. Violet Rust ; spots yellow- 

 ish ; son subrotund, scattered, generally on the under surface ; 

 epidermis ruptured, persisteut ; spores subglobose, brown. — On 

 leaves and petioles of Violets. July. Not uncommon. Uredo 

 spores of Puccinia Violce. 



Trichobasis Parnassiae, 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 Pamassia 

 palustris. 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. 



