202 MICEOSCOPIC PtJNGI. 



hjjpogenous, scattered in minute tufts ; spores multiseptate, ter- 

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

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

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



Phragmidium bullatum, West. Epicauline ; sori elon- 

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

 which is rendered buUate, 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 oase.— On Mosa canina twigs. 



Tbiphbagmium, Lk. 



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

 Outl., p. 332. 



Triphragmiuin Ulmarise, Lk. Meadow-SweetBkand; 

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

 dermis ; at len^h, when the cuticle has vanished, effuse ; spores 

 brown, subturbinate, divided by a vertical dissepiment, shortly 

 pedicellate. — On leaves of Meado"* -sweet, Spircea tilmaria. 

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

 fig. 43.) 



PucciNiA, Pers. 



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

 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. Very common, and in- 

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

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



Pueeinia arundinacea, Hedw. Eeed Beand; amphi- 

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

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

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

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

 found on Beeds. 



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

 fluent in leaves, following the veins of the leaves ; pseudo-spores 



