1921] The Thelephoraceae of North Carolina 159 



On deciduous woods, mostly with bark on. 



Margin distinct and often uplifted a little in places. 

 Deep brown with a conspicuous whitish border; sur- 

 face velvety, not cracking P. albomarginata (2) 



Brownish purple; finely cracked superficially when 



dry P. violaceo-lividum (3) 



Margin very thin and indistinct, closely adnate; 



Light gray to white with creamy areas, texture loose 

 and velvety-looking; spores very long and narrow, 



2-2.6 X 13-16.61X P. longispora (4) 



Not as above. 



Deep blackish brown when wet, a much hghter gray- 

 brown when dry; only 55-75/x thick; surface glab- 

 rous, nodulated, cracked to the wood when dry. P. cinerea (6) 

 Whitish to ochraceous buff; thick (200-250m), sur- 

 face glabrous, cracking when dry to show the pure 

 white tissue beneath; margin thin and fading away. P. mulata (7) 

 Margin distinct but irregular and byssoid when growing, 

 in places connected with extensive ropy strands; color 

 of surface buffy to chamois P. filamentosa (5) 



1. Peniophora gigantea (Fr.) Massee. 



Plate 31 



Patches up to 8 cm. wide by 14 cm. long, adnate, sub-waxy; when 

 old smooth and even, when young shghtly hypochnoid; color varies 

 with age, grayish white or hght cream to vinaceous buff when old; 

 surface minutely granular under a lens; margin indeterminate when 

 young, later determinate. Structure, in section, up to 1 mm. thick, 

 made up of two distinct layers (apparently three before the applica- 

 tion of KOH) of about equal thickness; lower layer consisting of 

 closely packed, septate, considerably branched, clamp-connected 

 hyphae (clamp connections are difficult to make out) 4:.2\x thick which 

 are more loosely packed at surface of substratum and become very 

 closely packed toward the center of the plant; upper layer made up 

 of closely packed, almost vertical hyphae with many faintly encrusted 

 cystidia scattered throughout, which are 9.3-ll.l[i, thick. Basidia 

 club-shaped with the end swollen, 4 x 11-18[jl. 



Spores oval, hyahne, smooth, 2-3.5 X 3.7-5.5[jl. 



Our plant agrees completely with plants of this species from 

 Bresadola at the New York Botanical Garden Herbarium. The 

 dried plant has a subtranslucent, parchment-like appearance. 

 4306. On ground side of new pine sills and leaves which had been on ground four 

 months, Clark's Sawmill, May 10, 1920. 

 Common. Curtis (as Corticium). 



