214 MICROSCOPIC FUNGI. 



smooth, yellowish-brown ; pedicels very \or\g, thickened, hyaline^ 

 persistent. — On the stems of Polygonum aviculare. October^ 

 Common. 



Uromyces sparsa, Lev. Sandwort Kust ; spots pallid ; 

 sori sub-rotund and oval, amphigenous and cauline ; epidermis 

 erumpent ; sporidia ovoid, brownish ; peiiuncles thickened, short.. 

 — On Spergularia rubra. Swanscombe Marches. June. 



Uromyces graminum, Cooke. Cocksfoot Rust ; epi- 

 phyllous; sori oblong or coutiuent and linear, convex, black and 

 shining, so as easily to be confounded on casual observation with 

 Dothidea graminis, at length bursting longitudinally ; sporidia- 

 subglobose or ovate, tawny, with hyaline pedicels of variable 

 length. — On leaves of Dactylis glomerata. 



Gymnosporangium, DC. 



Peduncles extremely long, agglutinated by gelatine into a 

 tremelloid expanded mass. Spores uniseptate. 



Gjmanosporangium Juniperi, Lk. ; forming a soft gela- 

 tinous, irregular, orange mass ; spores ovate or subelliptic, filled 

 with subglobose granules. — Or\\'\v'm?:l^\gsoi Juniperus communis. 

 Said to be one generation of Rcsstelia cornuta wliicii occurs on 

 leaves of Mountain Ash. 



PODISOMA, Lk. 



Peduncles extremely long, agglutinated by gelatine into a com- 

 mon stem, spreading out above into a clavuriaform mass ^ 

 spores mostly uniseptate. — Berk. OutL, p. 331. 



Podisoma Juniperi, Pr. ; orange, clavariaeform, somewhat 

 branched ; stroma simple ; spores very long, lanceolate, filled with 

 elliptic granules.— On living branches of Jimiperus communis. 

 Not common. Said to be one generation oi Rcestelia lacerata 

 which occurs on Hawthorn leaves. 



Podisoma Sabinge, Fr. ; red-brown, tuberculiform and 

 clavate, simple ; stroma obliterated ; spores obovate, uniseptate. 

 — On living branches of Juniperus Sabin(s. April. Said to be 

 one generation of Rastelia caucellata which occurs on leaves of 

 the Pear-tree. 



Podisoma foliicolum, Berk. Is not a true species of 

 Podisoma. 



