Part 3, 1917] AGARICACEAE 151 
lamellae rather broad, subdistant, rounded behind, radiating from a lateral or eccentric point, 
whitish, becoming ferruginous; spores subellipsoid, 8.5-10 & 6-7.5 p. 
Type Locality: Forestburgh, New York. 
Haxrrat: On decaying wood, bark, etc., in damp, shaded places. 
DistRIBUTION: Temperate North America west to Colorado. 
ILLUSTRATIONS: Atk. Stud. Am. Fungi ed. 1. f. 150; ed. 2. f. 154; Hard, Mushr. f. 227. 
10. Crepidotus Betulae Murrill, sp. nov. 
Pileus fleshy, rather thick, suborbicular or reniform, dimidiate, about 2 cm. broad; surface 
dry, villose with felted hairs, glabrous toward the margin with age, pure-white, margin entire, 
concolorous; lamellae rounded behind, crowded, broad, plane, pure-white, at length colored 
by the spores, which are ellipsoid, dark-ochraceous, 7-8 X 4-6 u. 
Type collected on fallen twigs of Betula lenta in the New York Botanical Garden, June, 1902, 
F. S. Earle 241 (herb. N. Y. Bot. Gard.). 
Hasirat: On dead wood of birch and occasionally beech and certain other deciduous trees. 
DisTRIBUTION: New York and the mountains of southwestern Virginia. 
11. Crepidotus putrigenus (Berk. & Curt.) Sacc. Syll. Fung. 5: 883. 
1887. 
Agaricus puirigenus Berk. & Curt. Ann. Mag. Nat. Hist. III. 4: 292. 1859. 
Pileus sessile, subreniform, densely imbricate, 2-5 cm. broad; surface dirty-white, tomen- 
tose, moist, margin slightly striate; lamellae rather crowded, broad, dirty-white to ferruginous; 
spores subglobose, 7 » long. 
Type LOCALITY: Santee Canal, South Carolina. 
Hasirat: On moist, decayed logs. 
DISTRIBUTION: New York to Alabama and west to Missouri. 
Exsiccati: Rav. Fungi Am, 410 
12. Crepidotus malachius (Berk. & Curt.) Sacc. Syll. Fung. 5: 883. 
1887. 
Agaricus malachius Berk. & Curt. Ann. Mag. Nat. Hist. ITI. 4: 291. 1859. 
Pileus fleshy, thin on the margin, thicker at the base, reniform, orbicular, cuneate or 
flabellate, convex or nearly plane, sometimes depressed behind, sessile or with a very short, 
inconspicuous, white, tomentose stipe, solitary, gregarious, or imbricate, 2.5-6.5 em. broad; 
surface glabrous or slightly tomentose at the base, hygrophanous, watery-white or grayish- 
white and striatulate on the thin margin when moist, white when dry; context white; lamellae 
thin, crowded, rounded behind, white or whitish, becoming brownish-ferruginous; spores 
globose, 6-7.5 u. 
‘Type LocaLiry: New England. 
Haprrat: Much decayed, prostrate, mossy trunks. 
DISTRIBUTION: Maine to Washington and south to Alabama and Ohio. 
ILLUSTRATIONS: Bull. N. Y. State Mus. 122: pl. 112, f. I-4. 
13. Crepidotus mollis (Schaeff.) Quél. Champ. Jura Vosg. 106. 
1872. 
Agaricus mollis Schaeff. Fung. Bavar. 4: Ind. 49, 1774. 
Pileus fleshy, soft, obovate or reniform, often undulate or lobed, 3-8 cm. broad; surface 
glabrous, flaccid, pallid, canescent; lamellae decurrent, crowded, linear, 2-5 mm. broad, 
white to watery-cinnamon; spores brownish-fuscous, 8-9 X 5-6 u; cystidia filiform, 35 X 4 yn. 
‘TYPH LOCALITY: Bavaria. . 
Hasrrat: On decayed logs of both deciduous and evergreen trees. . : : 
DIstRIBUTION: New England to Washington and south to Alabama and California; also in 
2. . 
iba ere ee Cooke, Brit. Fungi pl. 498 (535); Hussey, Ill. Brit. Myc. 1: pl. 74; Lucand, 
Champ. Fr. ol. 112; Pat. Tab. Fung. 1: pl. 227; Ricken, Blatterp. Deutschl. pl. 61, f. 1; Schaeff. 
Fung. Bavar. pl. 213. 
omen: Rav. Fungi Car. 3: 2; Sydow, Myc. Mar. 3420 (as C. applanatus), 
