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THE THELEPHORACEAE OF NORTH AMERICA. VII ^ 



Septobasidium 

 edward angus burt 



Mycologist and Librarian to the Missouri Botanical Garden 

 Associate Professor in the Henry Shaw School of Botany of 



Washington University 



SEPTOBASIDIUM 



Septobasidium Patouillard, Jour, de Bot. 6 :61. textf. 1892 ; 

 Essai Taxoii. Hym. 7. 1900; Sacc. Syll. Fung. 11:118. 1895; 

 ibid. 14:215. 1900; ibid. 16:184. 1902; ibid. 17:203. 1905; ibid. 

 21:445. 1913. — Jola Moller, A., Bot. Mitth. a. d. Tropfen 8, 

 Protobasidiomyceten 22-29. /;?. 4. f. 4. 1895 ; Engl. & Prantl, 

 Nat. Pflanzenfam. I.l** :84. 1897; Sacc. Syll. Fung. 14:245. 

 1900. 



The genus was founded upon Septobasidium pedicellatiwi 

 Pat. and Septobasidium velutinum Pat. 



Fructifications resupinate, effused, coriaceous, producing 

 probasidia upon the hyphae at or near the hymenial surface ; 

 the probasidia remain attached to the hyphae and either pro- 

 duce at the apex a few-celled, hyaline, spore-bearing filament, 

 or elongate, become septate, and differentiate into such a 

 filament, usually termed a transversely septate basidium; 

 spores simple, hyaline, even, borne one to each cell by the 

 terminal cell and next lower cells. 



Jj The spores are apparently produced in succession upon 

 Q the spore-bearing organ rather than simultaneously, for in 

 only two instances have I observed two spores present at the 

 same time upon the same organ; in these the two spores 

 were very unequal in size. One sees a spore attached to the 



-|; terminal cell more frequently than to lower cells but perhaps 



"Y-b Note. — Explanation in regard to the citation of specimens studied is given 



in Part VI, Ann. Mo. Bot. Gard. 3:208, footnote. The technical color terms 

 used in this work are those of Rldgway, Color Standards and Nomenclature. 

 Washington, D. C, 1912. 



iJssued November 4, 1916. 



Ann. Mo. Bot. Gard., Vol. 3, 1916 (319) 



