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 Taxon. Hym. 7. 1900; Sace. Syll. Fung. 11:118. 1895; 
1614. 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. pl. 4. f. 4. 1895; Engl. & Prantl, 
Nat. Pflanzenfam. L1**:84. 1897; Sace. Syll. Fung. 14:245. 
1900. 
The genus was founded upon Septobasidium pedicellatum, 
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. 
The spores are apparently produced in succession upon 
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 
Nore.—Explanation in regard to the citation of specimens studied is given 
in Part VI, Ann. Mo. Bot. Gard. 3:208, footnote. e technical color terms 
used in this work are those of Ridgway, Color Standards and Nomenclature. 
Washington, D. C., 1912. 
1[ssued November 4, 1916. 
ANN. Mo. Вот. GARD., Vor. 3, 1916 (319) 
