194 MICROSCOPIC FUNGI. 



Peridermium, Chev. 



Peridium elongated, at lepgth bursting irregularly. Spermo- 

 gonia scattered, conspicuous. 



Peridermium Pini, Chev. Peridia oblong, scattered, 

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

 or both ; spermatia 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. 



Peridermium 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.) 



iEciDiUM, 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 {net collected in tufts or clusters). 



JEcidium leueospermum, DC. White-spored Cluster- 

 Cups ; spots yellowish; peridia scattered, olten 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 anemones. (Plate I. tigs. 4-6.) 



JEcidium quadrifidum, DC. Four-lob ed 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. 



iEcidium albescens, Grev. Moschatel Cluster-Cups; 

 leaf blistered, whitish, scattered ; peridia white, split into a few 

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

 Adoxa moscliaiellina. Not uncommon. April. Said to be a state 

 of Puccinia Adoxa. 



