12 American Boletes 



pileus, solid and cream-colored within, 2-3 cm. long, 0.5-0.8 

 cm. thick. 



Known only from Pink Bed Valley, North Carolina, occurring 

 by the roadside in thin oak woods. 



II. Ceriomyces flaviporus (Earle) Murrill 



Pileus rather thin, convex to expanded, 6-9 cm. broad; surface 

 smooth, viscid, not glutinous, shining, chestnut-brown; context 

 whitish to brownish, unchanging, taste mild; hymenium plane, 

 tubes usually deeply depressed, but decurrent for nearly i cm. 

 in anastomosing lines, bright-lemon-yellow when young, be- 

 coming deep-yellow or flavid with age and retaining this color 

 in dried specimens, mouths small, i mm. broad, angular, edges 

 thin; spores narrowly ellipsoid, smooth, yellow, 15 X 6 fi; stipe 

 subequal or slightly ventricose, yellowish and smooth or marked 

 with glutinous granules above, tomentose and white stained 

 with brick-red below, solid, 6-9 cm. long, 1.8 cm. thick. 



Occasional under oaks in California. 



12. Ceriomyces auriporus (Peck) Murrill 



Pileus circular, plano-convex, 2-4 cm. broad, 0.5-1 cm. thick; 

 surface reddish-brown or yellowish-brown, rarely grayish-brown, 

 sometimes brown with a reddish-yellow tint or reddish-brown 

 in the center and olivaceous toward the margin, glabrous or 

 minutely tomentose, slightly areolate at times with age, the inter- 

 stices appearing yellow, usually dry, but somewhat viscid in wet 

 weather; margin even, thin, somewhat obtuse, slightly inflexed 

 on drying, concolorous ; context firm, fleshy, 3-5 mm. thick, white, 

 unchangeable, tinged with red under the cuticle, at first mild, 

 then unpleasant to the taste, the cuticle decidedly acid; tubes 

 plane or convex, adnate or nearly free, with a broad shallow 

 depression about the stipe, 3-5 mm. long, bright-golden-yellow, 

 unchanging, even after years in the herbarium, mouths con- 

 colorous, variable in size, small and circular when young, medium 

 or large and irregularly polygonal when old, edges thin, entire; 

 spores oblong-ellipsoid, curved at one end, lemon-yellow, 8-10 

 X 4-5 m; stipe central, short, slender, curved, tapering upward, 

 nearly glabrous, pulverulent under a lens, slimy in wet weather, 

 concolorous or paler, slightly striate above from the decurrent 

 edges of the tubes, solid, white or discolored-yellowish tinged 

 with red within, 2-4 cm. long, 4-8 mm. thick. 



Common in thin, dry woods from New England to Alabama 

 and west to the Rocky Mountains. Edible. 



