[Vol. 13 

 230 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



In section 100-150 ;x thick, not colored, with the hyphae sub- 

 erect, branched, rather loosely interwoven, about 2J^-3 \i in 

 diameter, not incrusted but bearing imbedded crystalline matter, 

 with very slender, colorless, hair-like paraphyses protruding 

 beyond the basidia and, in my opinion, with short branches near 

 the tips; no gloeocystidia ; spores noted by Massee as 8-9 X 3 y., 

 and by Cooke as 6-7 X 3 pi, none found in my preparations of the 

 type. 



I regret that a Corticium on Fagus, Ripton, Vermont, Nov. 4, 

 1896, which I misdetermined as C rubropallens, relying too 

 largely on general aspect and coloration in comparison with the 

 type, and communicated to Bresadola, Romell, and Karsten 

 under that name, should have led both Bresadola and Bourdot 

 into error concerning C. rubropallens. The names of those 

 specimens should be changed to C. roseopallens Burt, as described 

 in the present work. 



C. rubropallens belongs in the group of species with C. rubro- 

 canum, C. albido-carneum> and C. Atkinsonii. Each species of 

 this group lacks gloeocystidia and has the very slender and 

 numerous paraphyses protruding beyond the basidia and masking 

 the latter. The only recent gathering which I can now refer to 

 C. rubropallens on the basis of agreement in internal structure is 

 now white in herbarium condition and doubtful therefore. Its 

 few spores are 9-10 X 4 y.. 



Specimens examined: 

 Pennsylvania: Bethlehem, Schweinitz, type (in Schweinitz Herb.). 

 Alabama: Montgomery, R. P. Burke, 118 (in Mo. Bot. Gard. 



Herb., 19557). 



40. C. rubrocanum de Thiimen, Myc. Univ., 409, with de- 

 scription. 1876; Torr. Bot. Club Bui. 6: 95. 1876; Sacc. Syll. 

 Fung. 6: 632. 1888. 



Type: type distribution in de Thiimen, Myc. Univ., 409. 



Fructifications broadly effused, thin, adnate, membranaceous, 

 small pieces separable when moist, becoming tilleul-buff in the 

 herbarium, hoary, glabrous, finally cracking at the center into 

 polygonal masses 1-2 to a mm., the margin determinate or in- 

 determinate and thinning out, of the same color; in section 



