The Mycologic Flora of the 3Iiami Valley, 0. 77 



stuffed, stout, thickened upward, white or yellowish. Lamellae de- 

 current, ver_y distant, arcuate, rather broad, thin, white then yellowish. 

 Spores nearly globose, .004. 005 mm. long. (See Plate V.) 



In woods on rotten wood in spring and summer. Pileus 1^-3 in. 

 in diameter, stipe 1-2 in. long. The pileus is whitish and changes to 

 3'^ellowish as it passes maturity. 



B. Pileus campanulate from the first, the margin straight and 

 appressecl to the stipe. 



c. Lamelloi broad. 



66. A. CAMPANELLA, Katsch. — ^Pileus membranaceous, convex, um- 

 bilicate, striate, hygrophanous. Stipe hollow, horny, clear brown; the 

 base attenuate, tawny-strigose. Lamellae decurrent, arcuate, venose- 

 connected, luteous. 



Upon trunks in woods; csespitose, luteous-ferruginous. Pileus :|^-1 

 in. across, stipe i-2 in. long. 



67. A. FIBULA, Bull. — Pileus membranaceous, cucullate then ex- 

 panded, somewhat umbilicate, striate, expallent, even when dr}', weak 

 orange-color. Stipe setaceous, concolorous. Lamellae long decurrent, 

 distinct, whitish. Spores .003 X -002 mm. 



In moist places frequent among mosses, Pileus ^ an inch or less in 

 breadth, yellow or tawny with a dusky center; lamellae yellowish or 

 whitish; stipe 1-1^ in. high, yellow or tawny vvith a brownish apex. 



d. LamellcB narrow. 



.68. A, iNTEGRELLUs, Pcrs. — White, fragile, Pileus hemispheric 

 then expanded, pellucidstriate. Stipe very slender, short, pubescent 

 below. Lamellae decurrent, fold-like, distant, somewhat branched; the 

 edge acute. Spores .0125 mm. long. 



Common on old rotten stumps; gregarious or caespitose. Pileus thin, 

 and membranaceous ^ an inch or more broad, stipe h-l in. long. I 

 have seen an old stump covered with them after abundant rains. 



Subgenus IX. — Pleurotus. 



Spores white. Stipe excentric, lateral or none. Fungi irregular, 

 epiphytal. 



A. Stipe excentric. 



a. Lamellae adnate, 69-72. 



b. Lamellae decurrent, 73-75. 



