1918] 



BURT THELEPHORACEAE OF NORTH AMERICA. X 305 



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

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

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



9. H. Curtisii 



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

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



far apart, 30 X 5-6 /i ; 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 fi thick, fulvous ; lower dark zone is adnate to substratum ; 



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



14. 120-240 /i 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 system 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. E. badio-ferrugmea 



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.iS. H. rubiginosa 

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

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

 zonate, 300-400 /x thick, having scattered setae 35-40 X 4 J-5 fi; in 



Jamaica IJf. B. 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 35-45X4^-6 p.; in Cuba and Porto Rico 15. H. cubensis 



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

 crust on the upper side; hymenium w^hitish, 3 mm. thick, zonate 



within ; in Mexico 16. H. ungulata 



16. Fructification with upper edge sometimes barely reflexed, and 

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

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



the West Indies 17. H. corticolor 



16. Always resupinate so far as kno^vn 17 



17. Setae crowded, 27-45 X4i-5 /*; 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 

 30X4J /It, only rarely emergent; hymenium vinaceous-buff ; in Cuba.. 



SO. H. anomala 



17. Having setae larger than 27-45 X4A-5 /i and not having cystidia 18 



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

 4-6-sided areas, 150-500 fi 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 



