120 HYMENOGASTRACEAE— NIDULARIACEAE 



(a) Endosporium and exosporium separated by a hyaline mucus 



Leucogaster g : 281 



(b) Endosporium and exosporium contiguous 

 X. Spores elliptic to lanceolate, smooth 



Hysterangium 7: 155 

 y. Spores globose, rough or spiny 



(x) Peridium lanate; basidia usually 7-spored 



Sclerogaster ii:i6g 

 (y) Peridium not lanate ; basidia 3-4-spored 

 m. Gleba with a sterile base, radicate 



Octaviania 7: 158 

 n. Gleba without a sterile base, not radicate 



Martellia 16:252 

 2. Peridium separating from the gleba with difficulty or not at all 



a. Peridium covered with thread-like masses of mycelium 

 (i) Spores hyaline Rhizopogon 7 : 161 

 (2) Spores colored Melanogaster 7: 164 



b. Peridium without thread-like masses of mycelium 

 (i) Spores spiny 



(a) Gleba percurrent by a commella 



Arcangeliella 16:255 



(b) Gleba without a columella Hydnangium 7: 175 

 (2) Spores not spiny, smooth, verrucose, rugose, etc. 



(a) Gleba with branching columella and sterile base 



Dendrogaster 17:240 



(b) Gleba without columella or sterile base 



Hymenogaster 7: 168 



(incl. Chamonixia, Leucophleps 

 16:251) 



II. Peridium wall lacking 



1. Hypogaeous 



a. Spores elliptic, striate-sulcate Gautiera ^^■^^^ 



b. Spores globose, spiny or warty Gymnomyces 16:249 



2. Epigaeous; spores globose, warty Macowanites 7:179 



Family 69. NIDULARIACEAE 



7 ; 28, 9 : 265, II : 156, 14 : 256, 16 : 229, 17 : 214 

 Epigaeous, firaicole or lignicole, funnel-shaped to cup-shaped, leathery, con- 

 taining one to many lentiform or globoid sporangioles, the latter attached by a cord 

 to the wall of the peridium ; spores elliptic, smooth. 

 I. Peridium single 



I. Peridium with several to many sporangioles 



a. Peridium torn at the apex in opening Nidularia 7 : 28 



b. Peridium opening by a deciduous membrane 

 (i) Sporangioles attached to wall by a cord 



(a) Spores mixed with filaments ; peridium of three united layers 



Cyathus 7 : 32 



