LITERATURE CITED 5G7 



No sterile base in addition to columella. 



Endoperidium sessile or on a single short stalk, opening by a single apical 



pore. All parts of the world. Geastrum 



Endoperidium on several slender stalks, opening by several pores. Europe, 



South Africa, North and South America. Myriostoma 



Endoperidium with no pore, breaking away in pieces or adhering in pieces 

 to the dehisced exoperidium. Europe and South Africa. 



Trichaster 

 Family Tulostomataceae. 



Stipe (largely subterranean) stout, composed of parallel or interwoven carti- 

 laginous strands growing from the base of the endoperidium. 

 Basidia bearing 5 to 12 sessile spores. Ostiole stellately bordered 

 by several, usually colored, lobes. North and South America, 

 Asia, East Indies, Australia. Colostoma 



Stipe stout or slender, of parallel hyphae, sometimes scaly with age. 



With elaters marked with rings or spirals. Gleba with hymenial cavities. At 

 maturity stipe with a large volva and covered with overlapping 

 scales. 

 Sporocarp low bell-shaped (convex above and concave below). Widely 



distributed. Battarrea 



Sporocarp spherical (by some considered a species of Battarrea). Africa. 



Sphaericeps 

 Elaters lacking, but with typical capillitium. Hymenial cavities obliterated. 

 Inner peridium with apical mouth. Stipe slender. Widely distributed. 



Tulostoma 

 Inner peridium opening by stellate lobes. Stipe slender. Africa. 



Schizostoma 

 Inner peridium opening irregularly. Stipe stout. Europe and United States. 



Queletia 

 Family Podaxaceae. 



Columella wanting or very low. 

 With volva. 



Dehiscing by an apical pore. North America, Africa, Australasia. 



Chlamydopus 

 Dehiscing by irregular rupture of upper portion of endoperidium. W^estern 

 North America, and Africa. Dictyocephalos 



Volva wanting; urceolate at maturity. North and South America, Africa, 

 Asia, Australasia. Phellorinia 



Columella continuing as an extension of the stipe to or nearly to the top of the 

 sporocarp. 

 Peridium pulling loose at its lower edge. Spores sessile. North America, 



Africa, Asia, Australia. Podaxis 



Peridium remaining attached below, splitting laterally. Spores on sterigmata. 

 Australia. (Sometimes considered a form of Podaxis.) 



Chainoderma 



(For a more detailed key to the genera of the Gasteromyceteae the student is 

 referred to the latest publication by the late Dr. S. M. Zeller (1949). His arrange- 

 ment is not entirely in agreement with the ideas of the author.) 



Literature Cited 



Atkinson, George F. : The development of Agaricus campestris, Botan. Gaz., 

 42(4):241-264. PZs. 7-12. 1906. 



