[Vol. 13 

 208 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Pennsylvania: State College, L. 0. Overholts, 3630 (in Mo. Bot. 



Gard. Herb., 54698). 

 District of Columbia: Takoma Park, C. L. Shear, 1347. 

 Louisiana: St. Martinville, A. B. Langlois, ay. 

 Manitoba: Stony Mountain, A. H. R. Buller, 900 (in Mo. Bot. 



Gard. Herb., 58999) ; Winnipeg, G. R. Bishy, 134^ (in Mo. Bot. 



Gard. Herb., 60551). 

 Washington: Bingen, W. N. Suksdorf, 914. 

 Oregon: Corvallis, S. M. Zeller, 2066 (in Mo. Bot. Gard. Herb., 



58767). 

 California: Massack, A. S. Rhoads, 18 (in Mo. Bot. Gard. Herb., 



56987). 

 Jamaica: Castleton Gardens, W. A. & E. L. Murrill, 67, comm. 



by N. Y. Bot. Gard. Herb. ; Chester Vale, W. A. & E. L. Mur- 

 rill, 372, comm. by N. Y. Bot. Gard. Herb. 



23. C. Atkinsonii Burt, n. sp. 



Type: in Burt Herb. 



Fructifications effused, adnate, thin, small pieces separable 

 when moistened, white, even, waxy, not cracked, the margin 

 thinning out, with hyphae interwoven; in section about 150 [x 

 thick, not colored, composed of interwoven, branching, thin- 

 walled, occasionally nodose-septate hyphae 3 ;x in diameter, not 

 incrusted, which have in the middle and subhymenial region an 

 additional branched system of branches not more than 1 [x in 

 diameter and bearing short acicular branchlets; no gloeocystidia; 

 basidia simple, usually 4 sterigmata but rarely 5 or 6; spores 

 hyaline, even, ^Yi X 2-23^2 ^' 



Fructifications 1-3 cm. long, 1-2 cm. wide. 



On decaying, charred frondose wood and on Populus. New 

 York and Louisiana. November and January. 



C. Atkinsonii has snow-white color, waxy surface and small 

 spores. The noteworthy character separating it from other 

 white species is the system of delicate hyphal branches, so abun- 

 dant in the middle and subhjTnenial regions of the fructification 

 that they mask the outlines of the usual hyphae there and so fine 

 that on first impression they seem to be the walls of collapsed 

 hyphae. The mode of branching is not exactly that of C. in- 



