1918] 



BURT THELEPHORACEAE OF NORTH AMERICA. X 305 



12. Resupinate or reflexed, drying pliant, antique brown; hymenium 

 velvety, antique brown; setaie few and usually far apart, 

 60-70X6-8 /i; Massachusetts to Texas and westward to Oregon 



9. H. Curtisii 



12. Dimidiate and imbricated, or effuso-reflexed, concentrically sulcata, 

 Argus-brown, pliant; hymenium buckthorn-brown; setae few and 



far apart, 30X5-6 /*; Porto Rico to Venezuela and Guiana 



10. H. luteo-badia 



13. Always resupinate so far as known yet. Compare H. tabacina and H. 



rubiginosa which are frequently resupinate 14 



13. Usually reflexed or dimidiate, sometimes resupinate 15 



14. 200-700 fi thick, tawny olive to Brussels-brown, separable from the 

 substratum; a narrow, dark zone divides the hyphal layer into an 

 intermediate layer and a broad layer attached to the substratum ; 



Arkansas to Mexico and in Cuba 26. H. leonina 



14. 120-260 /* thick, fulvous ; lower dark zone is adnate to substratum ; 



cystidia present ; in Louisiana and Jamaica 27. H. fulva 



14. 120-240 fi thick, between Verona-brown and cinnamon-drab, slightly 



glaucous, adnate; lower dark zone bordering the intermediate 



layer is adnate to substratum ; paraphyses colored, with pinnatifid 



tips ; Georgia to Mexico, and in Cuba and Jamaica . . 28. H. pinnatifida 



15. Usually reflexed, sometimes resupinate, thin, sericeous, and antique 



brown at first, finally glabrous and deep brownish drab, the margin and 



intermediate layer orange-yellow; hymenium snuff -brown to sepia, 



deeply cracked in resupinate portions into radiating systems, about 



one ^stem for each centimeter of area; common throughout Canada 



and United States 11. H. tabacina 



15. Fructifications imbricated, conchiform, umbonate-sessile, or reflexed, 

 sericeous, lineate-radiate, becoming variegated with concentric brown 

 zones; closely related to H. tabacina but not cracking into radiating 



systems ; found on vertical surfaces ; Canada to Carolina 



12. H. badio-ferrugvnea 



15. Reflexed, sometimes resupinate, coriaceous-rigid, thick, concentrically 

 sulcate, Brussels-brown, becoming fuscous-black, the margin ochraceous- 

 tawny; hymenium colliculose, bister, with conspicuous setae; Canada 

 to Mexico and westward to the Pacific, and in Porto Rico.i5. H. rubiginosa 

 15. Broadly reflexed, coriaceous-rigid, shallowly concentrically sulcate, 

 zonate, Prout's brown; hymenium even, Sudan-brown; setigerous layer 

 zonate, 300-400 /i thick, having scattered setae 35-40X4^-5 fi; in 



Jamaica 11^. H. reflexa 



15. Imbricated, flabelliform, dimidiate, umbonate-sessile, or reflexed, thin, 

 pliant when dry, concentrically sulcate, becoming snuff-brown to Rood's 

 brown; hymenium even, antique brown; setigerous layer 80-100 fi thick, 



having setae 35-45 X 4 J-6 /x ; in Cuba and Porto Rico 15. H. cubensis 



16. Fructifications somewhat hoof-shaped, sessile, with a black, hard 

 crust on the upper side; hymenium whitish, 3 mm. thick, zonate 



within ; in Mexico 16. H. ungulata 



16. Fructification with upper edge sometimes barely reflexed, and 

 black; hymenium drab, 400-1000 /u thick; growing on bark of 

 living trunks of oak, elm, etc.; New Jersey to Florida and in 



the West Indies 11. H. corticolor 



16. Always resupinate so far as known 17 



17. Setae crowded, 27-45X4^-5 /x; hymenium cinnamon-brown to Prout's 



brown ; in Cuba and Jamaica 29. H. multisetae 



17. Colorless, incrusted cystidia and colored setae present, the setae about 

 30X4i fi, only rarely emergent; hymenium vinaceous-buff ; in Cuba.. 



30. H. anomala 



17. Having setae larger than 27-45X4^ fi and not having cystidia 18 



18. Cinnamon-brown to bister and Rood's brown, cracked into small 

 4-6-sided areas, 150-500 n thick; setae 60-70X8-12 fi, starting in 

 all parts of the fructification; Canada to Texas, westward to 

 Kentucky, and in Jamaica 31. H. corrugata 



