1920] 



BURT THELEPHORACEAE OF NORTH AMERICA. XII 87 



26. Spongy-soft, tomentose; cystidia 36-60X9-12/*; spores 5-9X3-4/*; 



New York to Mexico 66. S. spumeum 



26. Bursting out from the bark, forming a gray hymenium and becoming 



reflexed, 1-2 mm. in diameter 67. S. erumpens 



26. Corky, rigid, concentrically sulcate, bister; hymenium ruddy, be- 

 coming zonate; cystidia 30-50 X8-12yu; spores 4-6X3-5m; on 

 hemlock and other conifers, Canada to Texas and westward to 

 the Pacific coast 68. S. sulcatum. 



26. Tobacco-colored and sulcate above, with a horn-like crust under the 

 tomentum; hymenium whitish; cystidia 30-36 X7/x; on oak, 



North Carolina and Ohio to Mexico 69. S. subpileatum 



27. With aspect of S. subpileatum as given above, but hymenium contains numer- 

 ous and conspicuous bottle-brush paraphyses in addition to cystidia; 



Pennsylvania to Colombia 70. S. septum 



27. With brown, velvety hymenium and a white margin; paraphyses filiform, 



colored; spores hyaline, 6-llX3-4|/x 71. S. albobadium 



27. With aspect of dark specimens of S. albobadium, but with thicker, zonate 



hymenium and imbedded spores colored; Oregon to Mexico 



72. S. heterosporum 



27. Becoming narrowly reflexed, fuscous, 2-10 mm. in diameter; hymenium 



velvety, bister; paraphyses colored, with bushy-branched tips; Canada to 



Alabama and Arkansas 73. S. versiforme 



28. Snuff-brown and sulcate above, tomentose; hymenium pruinose, 

 zoned, containing bottle-brush paraphyses; on oak, Florida and 

 Venezuela 74. S. insigne 



28. Fuscous, sulcate, not tomentose but with upper surface a horn-like 



crust, 2-3 mm. thick; Mexico 75. S. durum 



28. Woody, resupinate, crowded as if confluent and then broken into 

 frustules, 2-4 mm. in diameter, above black and crust-like; hyme- 

 nium pinkish buff to whitish and pruinose; on oak. . . .76. S. frustulosum 



28. Usually resupinate, coriaceous-soft ; hymenium light vinaceous-purple 

 when young, becoming avellaneous, containing filiform paraphyses 

 with short lateral prongs ; aspect of Corticium evolvens; Canada to 

 North Carolina 77. S. roseo-carneum 



i. Stereum caperatum (Berk. & Mont.) Massee, Linn. Soc. 

 Bot. Jour. 27: 161. 1890; Lloyd, Myc. Writ. 4. Stip. Stere- 

 ums, 17. textf. 531. 1913. Plate 2, fig. 1. 



Thelephora caper ata Berkeley & Montagne, Ann. Sci. Nat. 

 Bot. III. 11: 241. 1849; Montagne, Syll. Crypt. 175. 1856; 

 Sacc. Syll. Fung. 6:523. 1888. 



Illustrations: Lloyd, loc. cii.; Engl. & Prantl, Nat. Pflanzen- 

 fam. (1: 1**): 124. f.H-J. 



Type: in Kew Herb. 



Pileus coracelous, infundibuliform, drying pinkish buff, the 

 upper side with elevated radial ridges and usually densely tomen- 

 tose with coarse fibers; in structure 600-700 ju thick, composed of 

 densely, longitudinally arranged, thick-walled, hyaline hyphae 

 3 ix in diameter ; stem central or sometimes absent, with attach- 

 ment by a tomentose disk; hymenium pale pinkish buff, some- 

 what radially rugose, glabrous ; hair-like cystidia not incrusted, 

 3-4 J n in diameter, flexuous, often constricted near the outer end, 



