Part 3, 1917} AGARICACEAE 153 
20. Crepidotus fulvifibrillosus Murrill, sp. nov. 
Pileus conchate, attached by a rather narrow base, not fully expanding, fragile, gregarious, 
1-2 cm. long and 1.5—2.5 cm. broad; surface uniformly dull-white, with tawny, fibrillose scales, 
strigose behind, margin thin, concolorous, entire to undulate or lobed, often lacefate with 
age; lamellae rather narrow, crowded, white, soon colored by the spores, entire and concolorous 
on the edges; spores globose, smooth, pale-yellow under the microscope, 4-5 yp. 
Type collected on a dead oak stump in deciduous woods at Falls Church, Virginia, July 2-6, 
1904, W. A. Murrill 104 (herb. N. Y. Bot. Gard.). 
DisTRIBUTION: Known only from the type locality. 
21. Crepidotus calolepis (Fries) Quél. Ench. Fung. 108. 1886. 
Agaricus calolepis Fries, Oefv. Sv. Vet.-Akad. Férh. 308: 5. 1873. 
Crepidotus fuluotomentosus Peck, Ann. Rep. N. Y. State Mus, 26: 57. 1874. 
Pileus suborbicular, reniform, or dimidiate, sessile or attached by a short, white-villose 
tubercle or rudimentary stipe, scattered or gregarious, 2.5-5 cm. broad; surface hygrophanous, 
watery-brown and sometimes striatulate on the margin when moist, whitish, yellowish, or 
pale-ochraceous when dry, adorned with small, tawny or reddish-brown, hairy or tomentose 
scales; lamellae broad, subventricose, moderately crowded, rounded behind, radiating from a 
lateral or eccentric white-villose spot, whitish, becoming brownish-ferruginous; spores ellipsoid, 
often uniguttulate, 8-9 X 5-6 yu. 
TYPE Locality: Europe. 
Hasirat: Dead wood of poplar, basswood, and various other trees. 
Distrisution: Throughout temperate North America; also in Europe. 
ILLUSTRATIONS: Cooke, Brit. Fungi pl. 499 (534)b; Fries, Ic. Hymen. pl. 129, f. 4. 
22. Crepidotus tiliophilus (Peck) Sacc. Syll. Fung. 5: 886. 1887. 
Agaricus tiliophilus Peck, Ann. Rep. N. Y. State Mus. 35: 133. 1884. 
Pileus moderately thin, convex, 1-2.5 cm. broad; surface minutely pulverulent, hygro- 
phanous, watery-brown and striatulate on the margin when moist, dingy-buff when dry; 
lamellae rather broad, subdistant, rounded behind, adnexed, concolorous, becoming ferru- 
ginous-cinnamon; spores subellipsoid, brownish-ferruginous, 6-7.5 X 4-5 y; stipe solid, often 
curved, pruinose, whitish-pubescent at the base, 4~8 mm. long, about 2 mm. thick. 
Tvpz LocaLity: East Berne, New York. 
Hagrrat: On dead trunks and branches of basswood, Tilia americana. 
DISTRIBUTION: Known only from the type locality. 
23. Crepidotus fammeus Murrill, sp. nov. 
Pileus reniform, convex, rarely slightly depressed behind, sessile or with a short stipe, 
1-1.5 em. broad; surface dry, ferruginous-orange, conspicuously imbricate-squamulose, margin 
slightly appendiculate, paler, not striate; context yellow, with bitter taste; lamellae adnate, 
rather broad, subcrowded, pale-yellow to ferruginous, paler and beautifully crenate on the 
edges; spores broadly ellipsoid, smooth, ferruginous, 7 X 4-5 ph. 
Type collected on dead, deciduous wood in mixed woods at Crabbottom, Virginia, July 17-21, 
1904, W. A. Murrill 221 (herb. N. Y. Bot. Gard.). 
Hasrrat: On fallen branches and dead logs of deciduous trees. . 
DIstTRIBUTION: Connecticut to the mountains of Virginia and Tennessee, and in southern 
Florida. 
24. Crepidotus rubriflavus Murrill. 
Agaricus dorsalis Peck, Ann. Rep. N. Y. State Mus. 24: 69. 1872. Not A. dorsalis Bosc, 1811. 
Crepidotus dorsalis Sacc. Syll. Fung. 5: 883. 1887. 
Pileus sessile, dimidiate or subreniform, plane or slightly depressed behind, 1.5-3 cm. 
broad; surface slightly fibrillose-tomentose, reddish-yellow, margin substriate, decurved; 
lamellae crowded, ventricose, rounded behind, radiating from a lateral, white, villose spot, 
yellowish, becoming brownish-ochraceous or subferruginous; spores globose, 6 » in diameter. 
Typx yocaLity: Greig, New York. 
Hastrat: On old logs in woods. : 
DistRIBUTION: New York to Michigan and Ohio. 
