Part 5, 1916] AGARICACEAE 361 
30. Gymmnopus tortipes Murrill, sp. nov. 
Pileus convex to subexpanded, broadly umbonate, thin, rather tough, cespitose, 1-1.5 
em. broad; surface smooth, glabrous, not striate, pale-reddish-brown, darker on the disk, 
margin entire, concolorous, inflexed when young: lamellae sinuate, crowded, rather broad, 
inserted, white: spores ellipsoid, smooth, hyaline, slightly curved on one side, 6-7 X 3-4 nu: 
stipe slender, equal, smooth, whitish-pruinose to subglabrous, subconcolorous, hollow, much 
twisted on drying, 3-4 em. long, 1-2 mm. thick. 
Type collected at the base of a stump near Auburn, Alabama, October 12, 1900, F. S. Earle 
(herb. N. Y. Bot. Gard.). 
DistTRIBUTION: Known only from the type locality. 
31. Gymnopus velutipes (Curt.) Murrill. 
Agaricus velutipes Curt. Fl. Lond. fase. 4: pl. 42. 1777-87. 
Collybia velutipes Quél. Champ. Jura Vosg. 59. 1872. 
Pileus fleshy, rather thin, convex or nearly plane, obtuse, commonly cespitose, 2.5-5 em. 
broad; surface glabrous, viscid, reddish-yellow or tawny, sometimes yellow on the margin 
and brownish on the disk, margin often wavy or irregular, thin: lamellae broad, subdistant, 
rounded behind, slightly adnexed, whitish or yellowish: spores narrowly ellipsoid or oblong- 
ellipsoid, 7.5-9 X 4y: stipe firm, externally cartilaginous, brown or tawny-brown, paler 
above, densely velvety-hairy, stuffed or hollow, 2.5-5 cm. long, 2-6 mm. thick. 
Type LOCALITY: England. 
Hasttat: On decaying wood and at the base of trunks of elm, willow, and other deciduous trees. 
DIstRiBuTION: Eastern United States to Iowa and Kansas; Oregon; Orizaba and the Tepeite 
Valley in Mexico; also in Europe. 
ILLUSTRATIONS: Ann. Rep. N. Y. State Mus. 51: ol. 50, f. 14, 15; Bull. U. S. Dept. Agric. 175: 
pl. 15, f. 3; Curt. Fl. Lond. fase. 4: pl. 42; Hard, Mushrooms f. 88; Hussey, Ill. Brit. Myc. 1: pl. 56; 
Lloyd, Myc. Notes 5: 41, f. 13; Mem. N. Y. State Mus. 3: pl. 47, f. 10-15; Mycologia 1: pl. 3, f. 6; 
Sow. Engl. Fungi $1. 384. 
Exsiceatt: Allesch. & Schn. Fungi Bavar. 435; Cavara, Fungi Longob. 17; Desmaz. Pl. Crypt. 
Fr. 525, 2154; Ellis & Ev. N. Am. Fungi 3001; Herpell, Prip. Hutpilze 19, 38; Jacz. Fungi Rossiae 
235; Krieger, Fungi Sax. 484; Roum. Fungi Sel. 6169; Sacc. Myc. Ven. 1105; Westend. Herb. Crypt. 
Belge 1087. 
32. Gymnopus tenuipes (Schw.) Murrill. 
Agaricus tenuipes Schw. Trans. Am. Phil. Soc. IT. 4: 147. 1822. 
Agaricus (Dermocybe) Hilairianus Mont. Ann. Sci. Nat. II. 8: 366. 1837. 
Agaricus rheicoloy Berk. & Curt. Ann. Mag. Nat. Hist. 3: 376. 1839. 
Agaricus (Collybia) cayennensis Mont. Ann. Sci. Nat. IV. 1: 94. 1854. 
Marasmius rhabarbarinus Berk. Jour. Bot. & Kew Misc. 8: 135. 1856. 
Marasmius amabilipes Peck, Bot. Gaz..4: 216. 1879. 
Agaricus cerinus Morgan, Trans. Cine. Soc. Nat. Hist. 6: 66. 1883. Not Agaricus cerinus Pers. 
1801 
Collybia lenuipes Sace. Syll. Fung. 5: 213. 1887. 
Agaricus (Collybia?) aurantiellus Speg. Fungi Guar. Pug. 16. 244. 1883. 
Pileus thin, subtranslucent, convex to plane or slightly depressed, solitary or gregarious, 
2-5 cm. broad; surface ochraceous to yellowish-red and finely and densely tomentose when 
young, becoming bay or chestnut and glabrous, rugose on the disk, margin concolorous, 
striate, not inflexed on drying: lamellae adnate with a short tooth, of medium width, crowded, 
interveined, stubventricose, flavous: spores ellipsoid, smooth byaline, 5-7 X 3-4 u: stipe equal, 
flavous or ferruginous to brownish, densely and persistently velvety-tomentose its entire length, 
4-7 cm. or more long, 2-4 mm. thick. 
Type LocaLity: Bethlehem, Pa. 
Hasirat: On dead wood. 7 . 
DISTRIBUTION: Ontario, New York, Pennsylvania, Missouri, Wisconsin, Minnesota, Ohio, 
Colorado, Florida, Cuba, Haiti, Porto Rico, Guadeloupe, Martinique, Dominica, British Honduras, 
Mexico, and Costa Rica; also in Venezuela, Guiana, and Brazil, 
33. Gymnopus microspermus (Peck) Murrill. 
Lentinus microspermus Peck, Bull. Torrey Club 33: 216. 1906. 
Pileus fleshy, thin, somewhat irregular, convex, cespitose, 2.5-5 cm. broad; surface 
glabrous, reddish-brown: lamellae adnexed, close, thin, emarginate, eroded, denticulate, white, 
becoming creamy-yellow: spores minute, globose, hyaline or tinged with yellow, 3-4 u: stipe 
fleshy-fibrous, sometimes eccentric, equal, glabrous, white or whitish, hollow, 5-6 cm. long, 
6-10 mm. thick. 
TYPE LOCALITY: Créve Coeur, Missouri. 
Hasrrat: On decayed wood. : 
Disrripution: Known only from the type locality. 
