366 NORTH AMERICAN FLORA {[VoLuME 9 
52. Gymnopus fuliginellus (Peck) Murrill. 
Collybia fuliginella Peck, Ann. Rep. N. Y. State Mus. 40: 53. 1888. 
Pileus convex or nearly plane, 3.5-6 cm. broad; surface glabrous, even, fuliginous-brown, 
margin irregular or undulate: context white; lamellae rather narrow, close, rounded behind, 
adnexed or nearly free, white: spores subellipsoid, 7.5-8.7 X 5-6 u, usually containing a single 
large nucleus: stipe colored like the pileus or a little paler, with a white tomentum at the 
base, subfibrillose, equal or slightly tapering upward, 3-5 cm. long, 4-6 mm. thick. 
TYPE LOCALITY: Elizabethtown, Essex County, New York, : 
Hasrtat: Under or near arbor-vitae trees, Thuja occidentalis. 
DISTRIBUTION: Known only from the type locality. 
53. Gymnopus dentatus Murrill, sp. nov. 
Pileus conic to expanded, usually with a prominent, conic umbo, cespitose, reaching 4 cm. 
broad; surface dry, glabrous, striate, dull-isabelline-avellaneous, slightly darker on the disk, 
margin concolorous, dentate: context thin, white, somewhat tough, with a farinaceous taste; 
lamellae deeply depressed or sinuate, broad, ventricose, rather distant, closely interveined, 
whitish: spores broadly ellipsoid, smooth, hyaline, 7~8.5 & 6<7 uw: stipe equal or tapering 
upward, white and glabrous above, concolorous and whitish-tomentose below, hollow, car- 
tilaginous, reaching 6 cm. long and 5 mm. thick. 
Type collected among short grass in open ground in the New York Botanical Garden, Septem- 
ber 22, 1912, W. A. Murrill (herb. N. Y. Bot. Gard.). 
Hasirat: On lawns. 
DISTRIBUTION: Vicinity of New York City. 
54. Gymnopus unakensis Murrill, sp. nov. 
Pileus convex to plane, rarely becoming slightly umbilicate, gregarious, 1-2 em. broad; 
surface smooth, glabrous, viscid when moist, dark-brown, margin concolorous, inflexed when 
young: lamellae sinuate-adnexed, broad, crowded, white, becoming somewhat fulvous when 
bruised: spores ellipsoid, smooth, hyaline, 6-7 X 4-5 uw: stipe subequal, nearly white, becoming 
fulvous when bruised, subglabrous, whitish-tomentose at the apex and base, 2-3 cm. long, 
2-4 mm, thick. 
Type collected among humus and fragments of dead wood in woods at Unaka Springs, Tennessee, 
August 18-24, 1904, W. A. Murrill 774 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
55. Gymnopus radicatus (Relhan) Murrill. 
Agaricus longipes Bull. Herb. Fr. pl. 232. 1784. Not A. longipes Scop. 1772. 
Agaricus radicatus Relhan, Fl. Cantabr. Suppl. 28. 1786. 
Gymnopus longipes Roussel, Fl. Calvados ed. 2. 62. 1806. 
Clitocybe megalospora Clements, Bot. Surv. Neb. 4:18. 1896. 
Pileus fleshy but thin, convex or nearly plane, sometimes somewhat umbonate, 2.5-7.5 
cm. broad; surface glabrous, viscid or even glutinous when moist, often radiately wrinkled in 
the center, varying in color from grayish-brown to dark-brown, sometimes almost white: 
context white; lamellae broad, subdistant, adnexed: spores ellipsoid, with a slight, oblique 
apiculus at one end, I5-17.5 X 10-12.5 w: stipe long, firm, glabrous, furfuraceous in one 
variety, colored like or paler than the pileus, at length striate or grooved, stuffed, slightly 
tapering upward, ending in a long, root-like extension which penetrates the earth deeply, 
10-20 cm. or more long, 4-6 mm. thick. 
TYPE LOCALITY: England. 
Hasrrat: In woods and bushy places, generally about stumps, attached to buried roots. 
DisTRIBUTION: Maine to Alabama and west to Nebraska and Kansas; also in Europe. 
ILLusTRaTIONs: Atk. Stud, Am. Fungi f. 93; Bull. Herb. Fr. pl. 232, 515+ Bull. U.S. Dept. Agric. 
175: pl. 2, f. 3; Conn. State Geol. & Nat. Hist. Surv. 3: pl. 6; Hussey, Ill. Brit. Myc. 1: pl. 36; My- 
cologia 6: pl. 137, f. I, pl. 138; Mem. N. Y. State Mus. 3: pl. 48; Sow. Engl. Fungi ol. 48. 
Exsiccati: Herpell, Prép. Hutpilze 7; Rav. Fungi Am. 408; Shear, N. Y. Fungi 6. 
56. Gymnopus albipilatus (Peck) Murrill. 
Collybia albipilata Peck, Ann. Rep. N. Y. State Mus. 49: 40. 1897. 
Pileus thin, convex or nearly plane, sometimes slightly depressed in the center, 8-12 mm.. 
broad; surface most minutely pubescent with short hyaline or whitish hairs, brown: lamellae 
