[Vol. 2 

 762 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



incrustation of its hyphae and by simpler parapliyses, which 

 are either unbranched or with only about 2-4 branches not 

 branching repeatedly and becoming so attenuated as to be 

 nearly invisible except for the granules which they bear. 



Specimens examined: 

 Colorado: Pike's Peak, G. G. Hedgcock, comm. by C. J. 



Humphrey, 2571, type (in Mo. Bot. Gard. Herb., 15157). 



9. S. scariosa (Berk. & Curtis) Burt, n. comb. 



Corticium scariosum Berk. & Curtis, Grevillea 2 : 3. July, 

 1873. — Corticium secedens Saccardo, Syll. Fung. 6:635. 1888. 



Type: type and cotype in Kew Herb, and Curtis Herb., 

 respectively. 



"Forming a thin, oblong, membranous stratum, w^ithout 

 any distinct border; hymenium pulverulent ochroleucous." 



— Original description. 



Structure in section 300-600 /x thick, ^\^th hyphae 2 /i in 

 diameter, branched, very loosely interwoven, extending from 

 substratum to basidia, with walls gelatinously modified, im- 

 bedded in jelly, much crystalline matter about 90-120 /x below 

 the hymenial surface; basidia at or near the surface, longi- 

 tudinally septate, pyrif orm to subglobose, 12-15 X 9-12 /x ; no 

 spores found. 



On alder, South Carolina. 



The type specimens of this species have the general habit 

 of Peniophora gig ant ea, which they also resemble in being 

 separable and in cracking and peeling up from the substratum, 

 but they are more lemon-yellow in color than specimens of 

 the latter species. The structure in section is distinctive and 

 suggestive of that of Eichleriella alliciens. Authors have 

 sometimes confused Corticium scariosum B. & C. with Cor- 

 ticium scariosum B. and Br., published from Ceylon a few 

 months later in the same year. The types of these fungi are 

 not of the same genus, the American specimens ha\dng longi- 

 tudinally septate basidia. 



Specimens examined: 

 South Carolina: Society Hill, M. A. Curtis, 4916 (type and 



cotype in Kew Herb, and Curtis Herb.). 



