PODAXALES 369 



1918a, 1919, 1924, 1929). Among the more important genera 

 Coker and Couch recognize 5 species of Hymenogaster, 10 

 species and 2 varieties of Hysterangium, 16 species of Rhizo- 

 pogon, 2 species each of Phallogaster and Gautieria, and 6 species 

 of "Leucogaster. Zeller and Dodge recognize 16 North Ameri- 

 can species of Hysterangium and 1 2 that occur in other parts of 

 the world. Their monographs list 15 species of North American 

 Rhizopogon, 5 each of Gautieria and Leucogaster, 2 each of 

 Leucophebs and Macowanites, and 3 each of Arcangeliella and 

 Gymnomyces. 



LITERATURE CITED 



Bambeke, C. van, "Sur revolution nucleaire et la sporulation chez Hyd- 

 nanghim carneinn Wallr.," Mem. acad. roy. set. Belgique, 54: 1^4, 



1904. 

 CoKER, W. C, AND J. N. Couch, The Gasterojnycetes of the eastern United 



States aJid Canada. 201 pp. University of North Carolina Press, 



Chapel Hill. 1928. 

 Fischer, E., "Mycologische Beitrage 32. Zur Entwickelungsgeschichte der 



Fruchtkorper von Hymenogaster," Mitt, natiirf. Ges. Bern., 1926:99- 



108, 1927. 

 FiTZPATRicK, H. M., "A comparative study of the development of the fruit 



body in Phallogaster, Hysterangium, and Gautieria," Ajjn. MycoL, 11: 



119-149, 1913. 

 Zeller, S. M., "Protogaster, representing a new order of the Gastero- 



mycetes," A?m. Mo. Botan. Garden, 27:231-239, 1934. 

 Zeller, S. M., and C. W. Dodge, "Rhizopogon in North America," Ann. 



Mo. Botaji. Garden, 5: 1-36, 1918. 

 "Gautieria in North America," Ann. Mo. Botan. Garden, 5: 133-142, 



1918a. 

 "Arcangeliella, Gymnomyces, and Macowanites in North America," Ann. 



Mo. Botan. Garden, 6:^9-59, 1919. 

 "Leucogaster and Leucophebs in North America," Ann. Mo. Botan. Gar- 

 den, i/: 389-410, 1924. 

 "Hysterangium in North America," Ajin. Mo. Botan. Garden, 7^:83- 



228, 1929. 

 Zeller, S. M., and Leva B. Walker, "Gasterella, a new uniloculate Gas- 



teromycete," Mycol, 27:573-579, 1935. 



Todaxales 



This group of Gastromycetes includes forms in which the 

 o-leba is borne on the under or inner side of a centrally stipitate 

 fructification resembling an ordinary mushroom. The order 

 contains both gymnocarpous and angiocarpous representatives, 



