194 MICROSCOPIC FUNGI. 



Peridermium, Chev. 



Peridinm elongated, at length bursting irregularly. SpermO' 

 gonia scattered, conspicuous. 



Peridermium Pini, Chev. Peridia oblong, scattered, 

 large; spores orange, subglobose; spermogonia vernal or autumnal, 

 or both; sperraatia large, white. — On young branches of Scotch 

 Fir. Common in Scotland, occasional in England. Summer. 

 (Plate II. figs. 27, 28.) 



Peridermium acicolum,Lk. Peridia elongated, scattered, 

 flattened laterally ; spores oblong or elliptic, large, orange. — On 

 leaves of Scotch Fir. 



Peridermium elatinum, Lk. Simple, immersed; peridia 

 elliptic, pallid ; sporidia orange. — On Silver Fir, altering both 

 foliage and ramification. Not common. 



PeridermiurQ columnare, Alb. and Schw. Simple, 

 slender, naked, cylindrical, elongated, lacerated at the apex, 

 white; sporidia orange- — On Picea. Watcombe, near Torquav. 

 September, 1867. {E. Parfitt.) 



^ciDiUM, Pers. 



Peridium seldom elongated, opening by a terminal mouth, sur- 

 rounded by a fringe of recurved teeth, or when short 

 bursting irregularly. Spores disposed in chains. Spermo- 

 gonia on the same or the opposite surface, clustered or 

 scattered, central or intermixed. 



Sect. I. — Peridia scattered {not collected in tufts or clusters). 



.fflcidiumleucospermum,DC. White-spored Cluster- 

 Cups ; spots yellowish ; peridia scattered, often covering the 

 whole under surface; spores white, ovate. — On both sides of 

 the leaves of the Wood Anemone. Common. June. Said to be 

 a state of Puccinia ayiemones. (Plate I. figs. 4-6.) 



-2Ecidium quadrifidum, DC. Four-lobed' Cluster- 

 Cups ; spots brownish ; peridia scattered, occupying almost the 

 entire under surface ; spores brown, subglobose. — On the under 

 side of leaves of Anemone in gardens. (Lobes at the mouth of 

 the peridium not constantly four.) April to May. 



-^cidium albescens, Grev. Moschatel Cluster-Cups ; 

 ]eaf blistered, whitisb, scattered ; peridia white, split int9 a few- 

 large teeth; spores yellowish-white. — On leaves and petioles of 

 Adoxa rnoschaieUina, ISot uncoQimon. April. Said to be a state 

 of Puccinia Adoxae. 



