202 MICROSCOPIC FUNGI. 



hypogenous, scattered in minute tufts ; spores multiseptale, ter- 

 minal joint obtuse; peduncles equal. — On leaves of barren Straw- 

 berry. Autumn. Common. The Uredo spores of this species 

 are Uredo Potentillamm. (Plate III. fig. 35.) 



Phragmidiiim bullatum, "West. Epicauline ; sori elon- 

 gated, pulvinate, for a long time covered with the epidermis, 

 which is rendered bullate, then fissured irregularly, and ultimately 

 thrown off; pseudo-spores cylindrical, 5-7-septate, mucronate 

 at the apex; epispore tough; pedicel short, hyaline, rather 

 thickened at the base.— On Rosa canina twigs. 



TRIPHRAG3IIUM, Lk. 



Spores trilocular, septa mostly vertical and horizontal.— Berk. 

 Outl., p. 332. 



Triphragmium Ulmarise, Lk. Meadow-Sweet Brand; 

 spots obliterated ; sori at first subrotund, covered with the epi- 

 dermis ; at length, when the cuticle has vanished, effuse; spores 

 brown, sublurbinate, divided by a vertical dissepiment, shortly 

 pedicellate. — On leaves of Meado> -sweet, S/drcea ulmaria. 

 Autumn. The Uredo spores are Uredo Ulmaria. (Plate III. 

 fig. 43.) 



Puccinia, Pers. 



Spores uniseptate, supported on a distinct peduncle. — Berk. 

 Outl., p. 329. 



Puccinia graminis, Pers. Corn Mildew; spots pale, 

 diffuse; sori linear, confluent, amphigenous ; spores at length 

 black, clavate, very slightly constricted. — On the leaves and 

 culms of Corn and Grass. Autumn. Yery common, and in- 

 jurious to corn. The Uredo spores of this species are Trichobasis 

 linearis. (Plate IV. figs. 57-59.) 



Puccinia arundinacea, Hedw. Reed Brand , amphi- 

 genous ; sori elongated, often confluent, emersed, convex, pro- 

 minent ; pseudo-spores brown, attenuated in both directions, 

 constricted at the septum, apiculate, on long pedicels. — On the 

 common Heed. Common. A variety of P. graminis is also 

 found on Reeds. 



Puccinia straminis, De Bary. Sori not erumpent, con- 

 fluent in leaves, follow iug the veins of the leaves ; pseudo-spores 



