19G MICROSCOPIC PUXGI. 



Aregma obtusatum, Pr. Strawberry Brand; hj^po- 

 f^enous, scattered, in minute tufts ; spores multiseptate, terminal 

 joint obtuse ; peduncles equal. — On leaves of barren Strawberry. 

 Autumn. Common. (Plate III. fig. 35.) 



Triphragmium, Lk. 



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

 OutL, p. 332. 



Triphragmiuni 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, subturbinate, divided by a vertical dissepiment, shortly 

 pedicellate. — On leaves of Meadow-sweet, Spiraa uhiaria. 

 Autumn. (Plate III. fig. 48.) 



Puccinia, Pers. 



Spores uniseptate, supported on a distinct peduncle. — Berl:. 

 OutL, p. 329. 



Puccinia graminis, Pers. Corn Mildew; spots pale, 

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

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

 of corn and grass. Autumn. Very common, and injurious to 

 com. (Plate IV. figs. 57—59.) 



Var. /3. Amndinis, Grev. Sori broad ; spores more constricted 

 and with longer peduncles. — On the leaves and sheaths of reeds. 

 Very common. 



Puccinia striola, Lk. Sedge Mildew ; spots pallid ; sori 

 linear, crowded, distinct, subconvex; spores at length black, 

 oblong and slightly constricted, or obovate, and not constricted. 

 — On Sedges, Rushes, &c. Autumn. Common. 



Puccinia coronata, Cd. Coronated Mildew ; spots pal- 

 lid ; sori linear, short, crowded, not confluent, surrounded by tho 

 ruptured epidermis ; spores shortly pedicellate, pallid ; the apex 

 surrounded by obtuse radiating teeth. — On various Grasses. 

 Autumn. Not uncommon. (Plate IV. figs. 60 — 62.) 



Puccinia truncata, B. and Br. Iris Brand ; spots 

 obliterated; sori oblong, brown, surrounded by the scarious 

 epidermis ; spores obovate-oblong, even, attenuated below, 

 upper cell abruptly truncate.— On Iris foetidissima. Autumn. 



Puccinia Asparagi, DC Asparagus Brand ; spots none ; 

 sori reddish-brown, generally on the stems, scattered and crowded, 

 surrounded by the ruptured epidermis; spores oblong, obtuse, 

 constricted ; peduncle white, long, thread-like.— On dead sterna 

 of Asparagus. Autumn. 



