1920] 



BURT THELEPHORACEAE OF. NORTH AMERICA. XII 179 



50. S. conicum Burt, n. sp. Plate 5, fig. 51. 

 Type: in Farlow Herb, and in Mo. Bot. Gard. Herb. 



Pileus coriaceous, small, rather thick, conical, sessile, attached 

 by the vertex, villose, with some specimens whitish to pale 

 olive-buff and others between wood-brown and Sayal-brown; 

 intermediate layer not bordered by a dark zone, nearly colorless, 

 containing many thick-walled and somewhat incrusted hyphal 

 ends 15-25X6 n but no colored conducting organs; hymenium 

 even, drab, without cystidia; spores hyaline, even, 4-4|X2| m. 



Pileus 2-4 mm. in diameter, 2-4 mm. high, about -mm. 

 thick. 



Singly on small, dead, frondose twigs. Cuba. 



If carelessly glanced at, specimens of this species might be 

 referred to S. ochraceo-flavum, but in S. conicum each of the eight 

 fructifications which I have seen is truly conical, pendant, and 

 attached by its vertex, while the pilei of S. ochraceo-flavum, S. 

 ochroleucum, etc., are reflexed; the hymenium of S. conicum is 

 glabrous, while that of S. ochraceo-flavum contains even-walled, 

 non-incrusted cystidia 20-25X4-6 m, protruding 15 /*. S. coni- 

 cum is noteworthy by the very numerous thick-walled and some- 

 what incrusted hyphal ends which are present in its intermediate 

 layer. On the hymenial side these bodies curve towards the 

 hymenium but do not reach its surface; on the opposite side 

 they curve to the upper surface of the pileus and protrude as 

 incrusted hairs forming a part of the villose covering of the 

 pileus, a structural feature suggestive of Cyphella. The speci- 

 mens of S. conicum were collected by Charles Wright during 

 his last trip to Cuba in about 1860 but were not sent to Berkeley 

 and Curtis for study. 



Specimens examined: 

 Cuba: Fungi Cubensis Wrightiani, 842, C. Wright, type, comm. 

 by W. G. Farlow (in Mo. Bot. Gard. Herb., 43906 and in 

 Farlow Herb.). 



51. S. vibrans Berk. & Curtis, Linn. Soc. Bot. Jour. 10: 332. 

 1868; Sacc. Syll. Fung. 6:577. 1888. Plate 5, fig. 52. 



An Stereum cupulatum Patouillard in Duss, Fl. Crypt. Antilles 

 Fr. 233. 1904? 



Type: in Curtis Herb, and Kew Herb. 



