562 CLASS BASIDIOMTCETEAE 



Peridium well developed at maturity. 



Sporocarp without root-like mycelial strands. 

 Spores ellipsoid, ovoid or fusiform. 



Trama plates irregular or radiating somewhat from a small sterile 



base. Old and New World. Hymenogaster 



Trama plates arising from a dendroidally branching axial strand 

 (possibly better assigned to the Hysterangiaceae). Europe. 



Dendrogaster 

 Spores spherical, spiny. 



No sterile base, but glebal chambers converging toward the center 



of the base. Europe. Martellia 



Glebal chambers converging toward a sterile base. Europe, North 

 America, Australia. Odaviania 



Sporocarp with root-like mycelial strands. 



Spores spherical, verrucose, cystidia present. Europe and North 



America. Sclerogaster 



Spores ellipsoid, smooth, no cystidia. Europe, North and South 



America, Asia, Australia. Rhizopogon 



Spores angular, no cystidia. North America. Nigropogon 



Percurrent columella. Annular glebal cavity divided by centripetally develop- 

 ing plates into several lobes or separate cavities. North America. 



Gasterellopsis 

 Genera of doubtful relationship, fusiform to pyriform, sometimes shortly 

 stalked: Gymnoglossum, Protoglossum, LeRatia, Clavogaster. 

 Family Hysterangiaceae. 

 Spores spiny or ribbed. 



Peridium wanting at maturity, spores oblong, ribbed. Europe, North Africa, 



and North America. Gautieria 



Peridium present at maturity, spores spherical. 

 No gelatinous layer beneath exoperidium. 



Basidia two- to four-spored. Europe. Maccagnia 



Basidia five- to six-spored. Java. Hoehneliogaster 



A gelatinous layer present beneath the thin exoperidium. Basidia two- 

 spored. East India. Clathrogaster 



Spores smooth, ellipsoid or rod-shaped. 



Columella a basal cushion or a mycelial strand, often branched, not per- 

 current to the apex. 

 Peridium with large gelatinous outgrowths. Australia. Phallobata 

 Peridium more or less uniformly thick. 



Gleba at maturity collapsing into a thin layer on the inner surface of the 



peridium. Australia. Gallacea 



Gleba not collapsing. 



Branches of the columella not dividing the gleba into sharply bounded 

 portions. 

 Sporocarp sessile. Europe, Africa, North and South America, 



Australia. Hysterangium 



Sporocarp stalked. Europe. Jaczewskia 



Branches of the columella dividing the gleba into sharply bounded 

 portions. 

 Sporocarp tuberoid, sessile. South America, Ceylon. 



Protuhera 

 Sporocarp pyriform, stalked. North America. Phallogaster 



