[Vol. 12 

 242 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



incrusted cystidia which are presumably what Massee really 

 saw. I see no reason for displacing the specific name given by 

 Massee for the later combination proposed by v. Hohnel & 

 Litschauer. The basidia are so young that I found none bearing 

 sterigmata nor spores and only twice slender spores 12-15 X 



3 [L. 



Specimens examined: 

 Exsiccati: Ravenel, Fungi Am., 457, type distribution, under the 



name Corticium epiphyllum. 

 South Carolina: Aiken, H. W. Ravenel y in Ravenel, Fungi Am., 



457. 

 Florida: W. W. Calkins. 

 Central America: Panama Chagres, F. L. Stevens, 1300 (in Mo. 



Bot. Gard. Herb., 63521). 



26. P. piliseta Burt, n. sp. 



Type: in N. Y. Bot. Gard. Herb., Mo. Bot. Gard. Herb., and 

 Burt Herb. 



Fructifications longitudinally effused, thin, somewhat mem- 

 branaceous, tender, small pieces separable when moistened, 

 whitish cream-color in the herbarium, not cracked, not shining, 

 the margin thinning out, with the hyphae interwoven; in section 

 100-120 \l thick, not colored, composed of ordinary, interwoven, 

 thin-walled hyphae about 3 y. in diameter, not incrusted nor 

 nodose-septate, and of a system of hyaline tissue about 1 \l in 

 diameter, not taking stain, branching like the coarser tissue of 

 Corticium investiens and with its delicate antler-shaped branches 

 barely visible in the hymenial surface; no gloeocystidia; cystidia 

 not incrusted, cylindric, obtuse, 4}^-6 ^ in diameter, protruding 

 30-45 {i, confined to the surface of the hymenium; spores hyaline, 

 even, cylindric, biguttulate, 9-11 X 4-43^ fx, copious. 



Fructification 7% cm. long, broken off at one end, 10-15 mm. 

 wide. 



On a very rotten, small, frondose limb about 1 cm. in diameter. 

 Porto Rico. June. 



P. piliseta is noteworthy by having in addition to an ordinary 

 hyphal system in its fructification an additional system, inter- 

 mixed with the first, of delicate, branching organs not taking 



V 



