1926) 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 325 



layer of hyphae longitudinally arranged along the substratum and 

 the very long and slender basidia have made me question whether 

 this species is not an Auricularia but I have been unable to 

 demonstrate transverse septation in any of the basidia. 



Specimens examined : 

 New York: Ray Brook, Essex County, C. H. Peck, type (in N. Y. 



State Mus. Herb., under the name Stereum populneum, and in 



Burt Herb.). 



STEREUM 



Stereum aculeatum (B. & C.) Burt, n. comb. 



Thelephora aculeata Berk. & Curtis, Grevillea 1: 149. 1873; 

 Sacc. Syll. Fung. 6: 523. 1888; Burt, Mo. Bot. Gard. Ann. 7: 

 232. 1920. 



I now refer to S. aculeatum a small specimen received since the 

 publication of the part on Stereum. This specimen has the com- 

 ponent fructifications central-stemmed, laterally confluent, and 

 resembling in aspect S. pallidum, but differing from the latter by 

 the presence of gloeocystidia and the absence of cystidia; the 

 spores are hyaline, even, 5 X 33^-4 \l. 



Fructifications 4 cm. high, 2J/ cm. wide. 



On the ground. South Carolina and Missouri. June and 

 August. 



Specimens examined : 

 South Carolina: Santee Swamp, H. W. Ravenel, 764, type (Curtis 



Herb., 2009, in Kew Herb., and Farlow Herb.) ; Clemson Col- 

 lege, P. H. Rolfs, 1835. 

 Missouri: locality not stated, Dr. Emig, comm. by J. R. Weir, 



18820 (in Mo. Bot. Gard. Herb., 58744, and Burt Herb.). 



S. atrorubrum Ell. & Ev. Acad. Nat. Sci. Philadelphia Proc. 

 1890: 219. 1890; Sacc. Syll. Fung. 9: 225. 1891. 



Type: in N. Y. Bot. Gard. Herb., and a fragment in Burt Herb. 



" Fan-shaped or reniform, 1-3 cm. broad and long, coriaceous, 

 thin, narrowed behind into a sessile base, hollow at first (about 

 the same color as S. complicatum) and tomentose-pubescent with 

 a few narrow faint zones, but when mature of a dull dark red 

 (about the color of the pileus of Pol. lucidus) with the surface 



