Part 5, 1916] AGARICACEAE 301 
60-70 X 12-18 w: stipe always lateral with a dorsal groove, short, white, pruinose, 1-3 cm. 
long, 5-15 mm. thick. 
TYPE LOCALITY: France. 
Hasitat: On the ground, usually among grass in the open and rarely in the woods, sometimes 
attached to buried wood. 
DistrRiBution: New York to Washington and south to Texas; ra Ba Europe. 
ILLUSTRATIONS: Atk. Stud. Am. Fungt f. 110; Mycologia 4: “pl. 5 6, f. 6; Pers. Obs. Myc. 
pl. 4, f. 1 Bres. Fungi Trid. gl. 50; Bull. Herb. Fr. pl. 226; Richon & Roze, Atl. Champ. pl. 45° 
-..12* Geopetalum densifolium Murrill, Mycologia 4: 215. 1912. 
’ Pileus fleshy, sessile, conchate to applanate, flabelliform, rather broadly attached, white 
throughout, gregarious, reaching 2 cm. broad; surface finely pubescent to subglabrous, smooth, 
margin entire, slightly inflexed on drying: lamellae very broad and very crowded, flaccid, 
overlapping on drying, white to isabelline, powdered with the spores, inserted, plane: spores 
ellipsoid, smooth, hyaline, 6-7 X 3.5 u. 
TYPE LocaLity: Seattle, Washington. 
Hasrrat: On dead deciduous wood in woods. 
DISTRIBUTION: Known only from the type locality. 
13. Geopetalum betulinum (Peck) Murrill. 
Panus betulinus Peck, Bull. Torrey Club 23: 413. 1896. 
Pileus thin, fleshy, suborbicular or dimidiate, subplane, prolonged behind into a short, 
stipe-like base, 5 cm. broad; surface smooth, glabrous, with tawny hairs at the base, grayish- 
brown, darker toward the base: lamellae decurrent, close, narrow, whitish: spores 4-5 X 1.5-2 yp. 
TYPE LocALIty: Newfoundland. 
Hasitat: On decaying wood of birch. 
DISTRIBUTION: Known only from the type locality. 
14. Geopetalum inconspicuum (Massee) Murrill. 
Pleurotus inconspicuus Massee, Jour. Bot. 30: 196. 1892, 
Pileus very thin, pellucid, resupinate, affixed by the whitish-villose base, nearly plane, 
suborbicular, gregarious, 1-2 mm. broad; surface white: lamellae concurrent, distant, narrow, 
white: spores ellipsoid, apiculate at the base, 6 K 3 u. 
TYPE Locality: Walliboo Valley, St. Vincent. 
Hasirat: On dry twigs. 
DIstRIBUTION: Known only from the type locality. 
ILLUSTRATIONS: Jour. Bot. 30: pl. 325, f. 
15. Geopetalum subelatinum Murrill, sp. nov. 
Pileus resupinate, soft, watery, expanded, contracted at times into a whitish, fibrillose, 
stipe-like base, 3-8 mm. broad; surface subglabrous, whitish: lamellae whitish, crowded, 
narrow. 
‘ Type collected on decayed wood five miles east of Santiago de las Vegas, Cuba, September 11, 
1904, F. S. Earle 192 (herb. N. Y. Bot. Gard.). 
Distrrurion: Cuba. 
16. Geopetalum haedinum (Berk. & Curt.) Murrill. 
Agaricus (Pleurotus) haedinus Berk, & Curt. Jour. Linn. Soc. 10: 288. 1868. 
Pleurotus haedinus Sacc. Syll. Fung. 5: 369. 1887. 
Pileus flabelliform or spatulate, sometimes slightly lobed, sessile by a narrow base, 6-10 
mm. broad; surface white, opaque, resembling kid leather: lamellae narrow, rather crowded, 
subventricose, pallid, whitish-pruinose on the edges: stipe wanting. 
TYPE LocaLity: Cuba. 
Hasirat: On dead wood. 
DIsTRIBUTION: Known only from the type locality. 
