300 NORTH AMERICAN FLORA [VoLumE 9 
yellowish-white on drying: spores copious, ellipsoid, smooth, hyaline, rounded at both ends, 
7-9 X 4-5 un, the spore-print assuming a salmon tint on exposure. 
Type collected on a dead birch stump in thin woods in the New York Botanical Garden, Sep- 
tember 4, 1915, W. A. Murrill (herb. N. Y. Bot. Gard.). 
DisTRIBUTION: Known only from the type locality. 
8. Geopetalum alliaceum (Berk. & Curt.) Murrill. 
Panus alliaceus Berk. & Curt. Ann. Mag. Nat. Hist. IT. 12: 427. 1853. 2 ay : = 
Pileus sessile, subeffused behind, confluent at times, 5-7 cm. broad; surfadé White, be- 
coming yellowish-brown, slightly tomentose, margin entire or undulate, involute, hispid; rough: 
lamellae attenuate behind, subdistant, white, becoming yellowish-brown: spores ellipsoid, 
curved, smooth, hyaline, 5-6 X 3 u. 
TYPE LOCALITY: South Carolina. 
Hasitat: Decayed willow logs. . 
DistrisutTion: Known only from the type locality. 
9. Geopetalum abietinum (Schrad.) Murrill. 
Agaricus abietinus Schrad. Spic. Fl. Germ. 132. 1794. 
Agaricus porrigens Pers. Obs. Myc. 1: 54. 1796. 
Pleurotus porrigens Gill. Champ. Fr. 1: 334. 1876. 
Pleurotus niphetus Ellis, Bull. Torrey Club 9: 18. 1882. 
Geopetalum porrigens Murrill, Mycologia 4: 215. 1912. 
Pileus rather thin, at first resupinate and suborbicular, then reflexed and prolonged, 
obovate, subelliptic, or ear-shaped, often longer than broad, sessile, 2.5-7.5 cm. broad ; surface 
glabrous or villose-tomentose toward the base, pure-white, margin involute when young, 
sometimes lobed in large specimens: lamellae narrow, linear, thin, crowded, sometimes slightly 
forked or anastomosing at the base, white: spores subglobose, smooth, hyaline, 4-7.5 Me 
TYPE Locatity: Germany. 
Hapitat: On much decayed wood of pine, hemlock, and other conifers. 
DISTRIBUTION: Newfoundland to West Virginia and west to Washington; also in Europe. 
ILLustRatTion: Cooke, Brit. Fungi pl. 259 (288) A. 
Exsiccatr: Ellis, N. Am. Fungi 904, 
10. Geopetalum angustatum (Berk.) Murrill. 
Panus angustatus Berk. Jour. Bot. & Kew Misc. 6: 318. 1847. 
Pleurotus petaloides Peck, Ann. Rep. N. Y. State Mus. 39: 64. 1887. Not P. petaloides (Bull.) 
Quél. 1872. 
Pleurotus styvatosus Atk. Jour. Myc. 8: 116. 1902. 
Pileus small, thin, rather tough, spatulate or flabelliform, narrowed behind into a stipe- 
like base, 2-5 cm. broad; surface white, dirty-white, or yellow, somewhat gelatinous when 
moist, slightly pubescent, farinaceous behind: lamellae decurrent, much crowded, very narrow, 
minutely pubescent, white, yellowish when dry: spores globose, smooth, hyaline, 3-4 u: cystidia 
fusoid-oblong, 35-45 X 12 u. 
TYPE LOCALITY: Waynesville, Ohio. 
Hasrrat: On decayed deciduous wood. 
DistRisvTion: Canada to Louisiana and west to Michigan. 
11. Geopetalum petaloides (Bull.) Pat. Hymén. Eur. 127. 1887. 
Agaricus petaloides Bull. Herb. Fr. pl: 226. 1784. 
Agaricus anomalus Pers. Obs. Myc. 1: 55. 1796. 
Agaricus spathulatus Pers. Syn. Fung. 479. 1801. 
Pleurotus petaloides Quél. Champ. Jura Vosg. 226. 1872. 
Pleurotus geogenius Quél. Ench. Fung. 149. 1886. 
Geopetalum geogenium Pat. Hymén. Eur. 127. 1887. 
Pileus fleshy, erect, fan-shaped or semi-infundibuliform, often divided nearly to the base, 
at other times wavy or lobed on the margin, which is at first incurved, 4-9 cm. broad; surface 
smooth, glabrous above, whitish-pruinose behind, avellaneous-isabelline to chestnut-brown, 
dry or viscid according to the weather: context white, with a farinaceous odor and taste; 
lamellae white, narrow, much crowded, sometimes forked behind, decurrent to the base of the 
stipe or nearly so: spores subovoid, smooth, hyaline, 7-8 X 3.5~4 u; cystidia fusoid, hyaline, 
