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[Vol.13 

 338 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



S. polyschista Berk. & Curtis, n. sp., in herb, under Corticium. 



Type: in Farlow Herb, and probably in Kew Herb. 



Fructifications effused, rather thin, loosely attached to the sub- 

 stratum, separable, fleshy, avellaneous in the herbarium, even, 

 cracking in drying and showing through the cracks the whitish, 

 fibrous subiculum, the margin thinning out, whitish, arachnoid; 

 in section 400-500 y. thick, slightly colored, with the hyphae near 

 the substratum loosely interwoven, thick- walled, 4J^-6 \l in 

 diameter, not nodose-septate, not incrusted, and with the 

 hymenial layer 200 \i thick, composed of densely interwoven 

 hyphae 3 [l in diameter; no cystidia; basidia cylindric, apparently 

 longitudinally septate, at the surface of the hymenium; spores 

 hyaline, even, curved, 10 X 4}/ ji. 



On under side of limb of dead Pyrus Mains. South Carolina. 

 July. 



This species should be recognized by the avellaneous color of 

 its fructifications which shrink greatly and crack in drying. It is 

 related to S. adusta. 



Specimens examined: 

 South Carolina: Society Hill, M. A. Curtis, 4950, type (in Farlow 



Herb.). 



S. Sheari Burt, Mo. Bot. Gard. Ann. 2: 758. textf. 2. 1915. 



This species was transferred to the genus Heterochaete, in Mo. 

 Bot. Gard. Ann. 8: 377. 1921, under the name Heterochaete 

 Sheari Burt. 



Exotic Species 



S. africana Burt, n. sp. 



Type: in Mo. Bot. Gard. Herb. 



Fructifications effused, closely adnate, thin, fleshy-gelatinous, 

 drying cartridge-buff, contracting in drying and cracking, even, 

 not shining, the margin not present; in section 240 [l thick, not 

 colored, composed of suberect, densely arranged hyphae with 

 walls gelatinously modified, somewhat granule-incrusted ; gloeo- 

 cystidia not colored, flexuous, 75 X 4-6 (x, confined to the hy- 

 menial region between the basidia; basidia pyriform, at the sur- 

 face of the hymenium; spores simple, hyaline, curved, 6-73^ X3 y.. 



