214 MICROSCOPIC FUMGI. 



smooth, yellowish-brown ; pedicels very long, thickened, hyaline, 

 persistent. — On the stems of Polygonum avieulare. October. 

 Common. 



TTromyoes sparsa, L6r. Sand-wort Rust ; spots pallid ; 

 sori sub-rotund and oral, ampbigenous and cauline ; epidermis 

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

 — On Sjpergularia ruhra. Swanscombe Marshes. June. 



TTromyces graminuin. Cooke. Cockspoot Rust; epi- 

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

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

 Dothidea graminia, at length bursting longitudinally ; sporidia 

 subglobose or ovate, tawny, with hyaline pedicels of variable 

 length. — On leaves of Dacti/lis glomerata. 



GYMNOSPOaAUGIUM, DC. 



Peduncles extremely long, agglutinated by gelatine into a 

 tremelloid expanded mass. Spores uniseptate. 



Gymnosporangium Juniperi, Lk. ; forming a 89ft gela- 

 tinous, irresular, orange mass ; spores ovate or aubelliptic, filled 

 with subglobose granules. — OnVmn^tviigsoiJMniperus communis. 

 Said to be one generation of Rasielia corrmta which occurs on 

 leaves of Mountain Ash. 



PODISOMA, Lk. 



Peduncles extremely long, agglutinated by gelatine into a com- 

 mon stem, spreading out above into a clavariaform mass ; 

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



Fodisoma Juniperi, Pr. ; orange, clavariseform, somewhat 

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

 elliptic granules.— On living hxsaoix&s pi Juniperus communis. 

 Not common. Said to be one generation of JRcestelia lacerata 

 which occurs on Hawthorn leaves. 



Podisoma Sabinse, Pr. ; red-brown, tubercnliform and 

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

 — On living branches of Jttniperus SabintB. April. Said to be 

 one generation of Bastelia cancellata which occurs on leaves of 

 the Pear-tree. 



Podisoma foliicolum, Berk. Is not a true species of 

 Podisoma. 



