1918] 



BURT THELEPHORACEAE OF NORTH AMERICA. X 



363 



Fig. 29 



H. eervina. 



Section, a, X 68; seta, 6, cystidia, 

 0, and spores, s, X 640. From type. 



33. H. eervina Berk. & Curtis, Linn. Soc. Bot. Jour. 10 : 

 334. 1868; Cooke, Grevillea 8: 147. 1880; Sacc. Syll. Fung. 

 6 : 596. 1888 ; Massee, Linn. Soc. Bot. Jour. 27 : 114. 1890. 



Type : in Kew Herb, and Curtis Herb. 



Fructification resupinate, effused, adnate, very thin, usually 

 cracked, drying Dresden-brown, the margin thinning out; in 

 structure 80-200 n thick, com- 

 posed of densely interwoven, 

 suberect hyphae, of crystal- 

 line masses, and of setae; 

 hyphae 2^-3 /x in diameter, 

 giving their color to the fruc- 

 tification ; crystalline masses 

 12-15 /x in diameter; setae 

 distributed in all parts of the 

 section and some starting 

 from the substratum, 60-90 X 

 10-12 /i, emerging up to 40 n, 

 tapering from the base to a 

 sharp apex; spores hyaline, even, 7-9x3^ y.. 



Fructifications 5 cm. or more long, about 1-2 cm. broad. 



On dead limbs and decorticated wood. Illinois, Louisiana, 

 and Cuba. 



By reason of its thin fructification, few hyphae, and abun- 

 dant setae starting from substratum, H. eervina is near H. 

 episphaeria in structure and general aspect, but may be dis- 

 tinguished from this species by larger spores and by the 

 presence of cystidia which finally become crystalline masses. 

 Berkeley's comment that specimens of H. eervina resemble 

 Hymenoehaete Curtisii is misleading and probably due to his 

 having referred to H. eervina a collection of Stereum um- 

 brinum, the Curtis Herb., 2308. 



Specimens examined: 

 Louisiana: A. B. Langlois, 267, comm. by U. S. Dept. Agr. 



Herb. 

 Cuba: C. Wright, 213, type (in Kew Herb, and in Curtis 



