[Vol. 12 

 328 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



96. P. Sacchari Burt, n. sp. 

 Type: in Mo. Bot. Gard. Herb. 



Fructifications longitudinally effused, adnate, thin, somewhat 

 membranaceous, noted as yellow when growing but now clay 

 color in the herbarium, even, cracking into polygonal masses 

 about Yi mm. in diameter which may curl away from the sub- 

 stratum more or less and show the exposed tissue colored like 

 the hymenium, the margin thinning out, of finely interwoven 

 hyphae; in section 75-110 (jl thick, with the thin sections not 

 colored appreciably, composed of densely arranged, suberect 

 hyphae about 3 \i in diameter, not incrusted, not nodose-septate; 

 no gloeocystidia; cystidia not incrusted, tapering towards the 

 apex, 5-6 y. in diameter, protruding up to 30 ^; spores hyaline, 

 even, 3^-4 X 23^-3 ja. 



Fructifications 8 cm. long, 10-13 mm. wide. 



On cane trash of Saccharum officinarum. Porto Rico. January. 



P. Sacchari was listed by Johnston & Stevenson, Dept. of 

 Agr. Porto Rico Jour. 1 : 227. 1917, as Peniophora sp. It has 

 not been received from other sources and is apparently a species 

 local to Porto Rico or with a preference for a sugar-cane sub- 

 stratum. It should be conspicuous by its yellow color. P. 

 citrinella is thicker and has incrusted cystidia. 



Specimens examined: 

 Porto Rico: Rio Piedras, J. A. Stevenson, 1204, type (in Mo. Bot. 



Gard. Herb., 11787). 



97. P. medioburiensis Burt, n. sp. 

 Type: in Burt Herb. 



Fructifications effused, thin, felty, small pieces separable when 

 moistened, becoming in the herbarium between light grayish 

 olive and deep olive-buff, the margin thinning out and some- 

 times paler; in section 200-300 \i thick, colored like the surface, 

 somewhat zonate, composed of suberect, thin-walled, even- 

 walled hyphae 3 y. in diameter and of incrusted hyphae 5 y. in 

 diameter over the incrustation; no gloeocystidia; cystidia usually 

 not incrusted, sometimes granule-incrusted, cylindric, obtuse, 

 6-8 [a in diameter, protruding up to 30 (x beyond the basidia; 

 basidia with 4 large sterigmata up to 6 y. long; spores white in 

 spore collection, cylindric, 8-14 X 4^-6 [k. 



