1918] 



BURT THELEPHORACEAE OF NORTH AMERICA. X 315 



preciably darker than adjacent tissue ; spores hyaline, even, 

 3-4xli-2i/i. 



Fructifications 1^3 cm. in diameter and laterally confluent, 

 or with reflexed part 1-2J cm. long, up to 4 cm.., and more, 

 broad by lateral confluence. 



On dead twigs, prostrate limbs, and at base of trees of 

 frondose species. South Carolina, West Indies, Mexico, and 

 South America to Paraguay and Chile. September to May. 

 Common. 



Fully developed specimens of H, Sallei may be recognized 

 by their thin, papery pileus which may be folded without 

 breaking, which is a rich Argus-brown both on the upper side 

 and hymenium, and concentrically sulcate, somewhat zonate, 

 and shining on the upper side also. Collections of young 

 specimens of this species when first found were referred by 

 early authors to H. tenuissima, a Ceylon species, of which 

 good material is now available for comparison in the collec- 

 tion from Ceylon distributed in Sydow, Fungi Exotici Exs., 

 318, and in Elmer, Philippine Island Plants, 9850, both of 

 which I have compared with a portion of the type communi- 

 cated by Sir David Prain through the kindness of Miss Wake- 

 field. The true H, tenuissima has its upper surface clothed 

 with coarse pubescence, as stated in the original description, 

 and the fibers of this pubescence do not finally become decum- 

 bent, radiately arranged, and the surface shining; the 

 hymenium of H. tenuissima is somewhat radiately rugose and 

 between Isabella-color and Dresden-brown not antique 

 brown. 



Specimens examined: 

 Exsiccati: Balansa, PI. du Paraguay, 3916, under the name 



Hymenochaete elegantissima; Ravenel, Fungi Am., 718, 



under the name Hymenochaete hadio-ferruginea; Rick, 



Fungi Austro-Am., 31, under the name Hymenochaete 



tenuissima; Smith, Central Am. Fungi, 149, under the name 



Hymenochaete tdbacina. 

 South Carolina : Seaboard, H. W, Ravenel, in Ravenel, Fungi 



Am., 718. 

 Florida: C. G. Lloyd, 2071, 



