up into thin irregular patches, watery-white becoming white or cream- 
colored when dry, sulcate nearly to disk, 10-30 mm. high and broad; gills 
adnate, elliptical, margins silvery-white when young; spores broadly ellip¬ 
tical, brownish-black, 10 X 11—16 p.; stipe fibrous, hollow, pruinose then 
glabrous, 25-75 'urn. long, 3-4 mm. thick. In decaying straw. 
C. picaceus Fr. Ep. 244. Pileus ovate then campanulate, glutinous, stri¬ 
ate to the disk, blackish, at first with a white felty layer which becomes 
broken into patches, 4-7 cm. across; gills free ; spores 14 X 8 (a; stipe 10- 
15 cm. long, white, smooth, hollow, base swollen. On the ground. 
C. ebulbosus Pk. Bull. Tor. Bot. Cl. 22 : 491. Pileus thin, campanulate, 
cuticle breaking into broad, superficial, presistent, whitish scales, some¬ 
what striate, grayish brown, marg. at length revolute, lacerated; gills 
narrow, thin, crowded, free, slate-colored becoming black ; stipe equal, 
hollow, white; spores elliptical, 7^-10 X 5 p- Pileus 2 ; -3' broad, stipe 
3 , ~6 / long, 2 // ~3 // thick. Caespitose, at base of cottonwood stumps. 
C. tomentosus Fr. Ep. 246. Pileus i 1 — 1.5' high, submembranaceous, 
cylindrical, then conical, then expanded and splitting, striate, pale gray, 
with a velvety floccose layer becoming torn into presistent patches; gills 
free, narrow, brownish then blackish-brown, stipe about 2' long, 2" thick, 
equal, velvety, grayish, hollow. On dung and in rich pastures. 
C. calyptratus Pk. Bull. Torr. Bot. club, 22: 205. Pileus when mature 
with a few floccose scales and crowned with a presistent stellately split, 
membranous, dingy-yellow or subtawny calyptra, radiate-striate to the 
disk, grayish-flocculent along the edges of the striae, blackish; gills free, 
dark lead colored becoming black; stipe equal, hollow, white, becoming 
blackish in drying except at base ; spores elliptical, black, 15-20 ji. Pileus 
about 2 1 broad, stipe 3 / ~4 / long, 2"-^" thick. Open cultivated ground. 
C. laceratus Pk. Bull. Torr. Bot. Club, 26: 68. Pileus thin, at first ovate 
and covered with a white separable floccose coat, which soon separates 
into scales or patches and finally disappears, then campanulate, striate 
nearly to the center, much torn or lacerated on margin, pale buff becom¬ 
ing darker; gills thin, close, free, white becoming black; stipe equal or 
slightly thickened at the base, striate, hollow, white; spores elliptical, 
I2 ~ x 5 X 8-10 ja. Pileus 2. 5-4 cm. broad, stipe 5-7.5 cm. long, about 4 mm. 
thick. Caespitose. On manure. 
B. Veil breaking up into superficial scales, cottony or fibrillose. 
a. Gills attached to the stipe. — * Pileus whitish or gray. 
C. niveus Fr. Ep. 246. Pileus .5^-1' across, submembranaceous, ellipti¬ 
cal, then campanulate and expanded, almost persistently covered with 
snow-white floccose down; gills slightly attached, narrow, becoming 
blackish; stipe i-5'-3' long, subequal, or slightly attenuated upwards, vil¬ 
lose, white, hollow; spores 16 X 11-13(1. On dung, especially of horses. 
C. Brassicae Pk. Rep. N. Y. St. Mus. Nat. His. 43:18, PL 2, f. 9-14. 
Pileus membranaceous, at first ovate or conical, then broadly convex, 
squamulose, finely striate to the disk, white becoming grayish-brown, mar¬ 
gin generally splitting and becoming recurved ; gills narrow, crowded, 
reaching the stipe, brown with a slight ferruginous tint; stipe slender, 
glabrous, hollow, slightly thickened at the base, white; spores elliptical, 
brown, 7.5 X 5 (i. Pileus 4 ,/ ~5" broad, stipe 8"-io" long. On decaying 
stems of cabbage. 
* * Pileus tawny or brownish. 
C. domesticus Fr. Ep. 251. Pileus i.5 , -2 / across, thin, ovate, then cam¬ 
panulate, obtuse, furfuraceous-squamulose, smoke-colored or pale grayish- 
white, disk brown, undulato-sulcate, splitting; gills adnexed, crowded, 
narrow, reddish-white, then blackish-brown; stipe 2'-3' long, 2 r, -fi r thick, 
slightly attenuated upwards, adpressed-silky, white, hollow; spores 14-16 
X 7-8 (a. On rotten wood, damp carpets, walls, etc. Caespitose. 
