148 



[Vol. 7 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Hedgcock & W. H. Long, comm. by C. G. Humphrey, 2561 

 (in Mo. Bot. Gard. Herb., 9438). 



1903. Not 



1874, nor Corticium 



42. S. sulphuratum Berkeley & Ravenel, Linn. Soc. Bot. Jour. 

 10: 331. 1868; Grevillea i: 163. 1873; Sacc. Syll. Fung. 6: 

 566. 1888; Massee, Linn. Soc. Bot. Jour. 27: 192. 1890. 



Plate 5, fig. 41. 

 Stereum ochroleucum Bresadola, Ann. Myc. i : 91 

 Stereum ochroleucum Fries, Hym. Eur. 639, 

 ochroleucum Fries, Epicr. 557. 1838. 

 Type: in Kew Herb, and Curtis Herb. 



Fructifications coriaceous, stiff, effuso-reflexed, finally umbo- 

 nate along the line of attachment to the substratum, and lobed, 



upper surface tomentose-hirsute, con- 

 centrically furrowed, "sulphur colored" 

 when fresh, becoming cartridge-buff to 

 gray in the herbarium, the surface not 

 hardened and crust-like under the hairy 

 covering; hymenium even, glabrous, 

 becoming pinkish buff to dirty tilleul- 

 buff in the herbarium; in structure 200- 

 400 fi thick under the hairy covering, 

 with the intermediate layer not differ- 

 entiated on its upper side into a dense 

 golden zone but hyaline throughout 

 and with the longitudinally arranged 

 hyphae 3-3| m in diameter, curving outward on the upper side to 

 form the hirsute covering and curving downward on the under 

 side to form the hymenium; no colored conducting organs, 

 gloeocystidia, nor cystidia; spores hyaline, even, 6-8 X 2-3 /x. 



Fructifications with resupinate portion ^-2 cm. broad, 10 cm. 

 and more long on under side of limbs; reflexed lobes ^-1| cm. 

 broad, ^-2^ cm. long. 



On dead limbs of Betula and other frondose species. Georgia 

 to Mexico, West Indies, Venezuela, and Brazil. September to 

 January. Not common. 



In growing condition, the sulphur color attributed to speci- 

 mens of S. sulphuratum and the heavy, hirsute covering of the 

 pilei, taken in connection with geographic range wholly south 



Fig. 21. S. sulphuratum. 

 Section of type X 68. The 

 outer border of intermediate 

 layer not a colored, crust-like 

 zone. 



