62 BNDOSPOKE^. [-PHYSARUM. 



Hab. On dead wood and leaves. — Birmingham (L;B.M.39) ; Ger- 

 many (Strassb. Herb.) ; Norway (Christiania Herb.) ; Philadelphia 

 (L:B.M.39). S. Carolina (B. M. 863, 991) ; California (L:B.M.39). 



SPECIES NOT MET WITH IN THE QUOTED COLLECTIONS. 



31. P. flavum Fries, Symb. Gast., p. 22. Sporangia globose, 

 rugoso-verrucose, yellow. Stalk short, equal, of the length of 

 the sporangium, much wrinkled, pale yellow. Columella none. 

 Oapillitium abundant, with large, angular, whitish or pale yellowish 

 lime-knots. Spores dull violet, minutely warted, 9"9 to 10'8 /x 

 diam. — Rost., Mon., p. 100. Craterium fla/oum Fr., Summ. Veg., 

 p. 454. 



Hah. On twigs of bramble, ferns, etc. — Sweden. 

 This description applies to Craterium citrinellum List. 



32. P. sulphureuin Alb. & Schw., Consp. Fung., p. 93, tab. 6, 

 fig. 1. Sporangia globose, erect, rugoso-squamulose, sulphur- 

 yellow. Stalk smooth, short, conical, white, de&sely charged with 

 lime within. Columella none. CapUlitium well developed, pale 

 violet-yellow; lime-knots abundant, angular. Spores bright 

 violet, smooth, 10 to 12 n diam. — Rost., Mon., p. 101. 



Hah. On dead leaves. — Germany and Russia. 



33. P. effusum Schwein., in Trans. Amer.^ Phil. Soc, iv. (1834), 

 p. 257. Sporangia creeping, forming a reticulation, or entirely 

 effused, white, much flattened ;" mass of spores and capillitium 

 becoming black. 



Hah. On earth in a hothouse. — Salem, N. America. 



34.' P. elegans Schwein., I.e. Sporangia crowded, subgloboso, 

 convex, flattened above, amethyst colour, subrugose. Spores 

 blackish -brown, conglomerated. Capillitium of thickish threads. 



Hah. Rare. — Salem, N. America. 



35. P. luteovalve Schwein., I.e. Sporangia irregularly lobed, 

 convex, more or less confluent, externally of a bright gold colour, 

 somewhat compressed, bivalved. Spores bright yellow. 



Hah. On fallen stems. — Carolina. 



This might refer to some species of Perichcena, 



36. P. polyaedron Schwein., I.e. Sporangia gregarious or some- 

 what scattered, rather large, blackish-fuliginous, dull, subhemi- 

 spherical, exactly pentagonal vidth straight sides, rugose, at length 

 breaking in a somewhat stellate manner from the persistent lower 

 part. Spores and dense capillitium of the same colour as the 

 sporangia. 



Hab. On logs of walnut. — Bethlehem, N. America. 



37. P. caespitosum Schwein., I.e., p. 258. Sporangia substipitate 

 or suddenly contracted at the base, clustered or scattered, tur- 



