420 NORTH AMERICAN FLORA [VoLumE 9 
plants. ‘They both grow gregariously in exposed grassy places and the best observer could not 
tell them apart. 
Clitocybe sulphurea Peck, Ann. Rep. N. Y. State Mus. 41: 62. 1888. Described and 
known only from specimens collected on decaying wood of spruce and balsam fir on Wittenberg 
Mountain in the Catskills, New York. There are five rather young specimens on the type 
sheet at Albany. They appear to be related to Cortinellus decorus, but the surface is not squam- 
ullose. : 
Chitocybe tarda Peck, Bull. Torrey Club 24: 140. 1897. The spores of this species are 
rose-colored instead of hyaline. Agaricus tardus Schw. is probably not distinct from Clitocybe 
concava. 
Clitocybe tuba (Fries) Gill. Champ. Fr. 137. 1874. (Agaricus tuba Fries, Epicr. Myc. 
72. 1838.) Reported by Peck as rare in New York, but his specimens are quite different from 
European ones. 
Clitocybe tumulosa (Kalchbr.) Sacc. Syll. Fung. .5: 162. 1887. (Agaricus tumulosus 
Kalchbr. Ic. Hymen. Hung. 13. 1873. Reported from New York once by Peck. 
Collybia aquosa adnatifolia Bull. N. Y. State Mus. 1°: 25. 1888. Peck states in his 49th 
report that this variety is probably a Clitocybe. 
Tricholoma cellare Banning & Peck; Peck, Ann. Rep. N. Y. State Mus. 44: 179 (67). 1891. 
This name was published by Peck without description or comment, although Miss Banning’s 
manuscript drawing and notes are quite complete. The lamellae being decurrent, the plant 
is a Clitocybe, or, if it grows on wood, a Monadelphus. 
Tricholoma Sienna (Peck) Sacc. Syll. Fung. 5: 137. 1887. (Agaricus (Tricholoma) 
Stenna Peck, Ann. Rep. N. Y. State Mus. 24:60. 1872.) Described from specimens collected 
on the ground in woods at Greig, New York, and apparently not reported since. A good 
drawing accompanies the types at Albany, and there is little doubt that this species is only 
a rather large form of Clitocybe sinoptca. 
41. MONADELPHUS Earle, Bull. N. Y. Bot. Gard. 5: 432. 1909. 
Pileus fleshy, putrescent, densely cespitose and wood-loving, attached to decayed trunks 
or roots: lamellae decurrent, rarely adnate: spores hyaline: stipe central or nearly so, fleshy or 
fleshy-tough: veil none. 
Type species, Agaricus illudens Schw. 
Pileus white or whitish. 1. M. revolutus, 
Pileus usually honey-yellow, squamulose on the disk. 2. M. caespitosus. 
Pileus saffron-yellow or orange-yellow, glabrous. 
Spores 4-5 uw in diamater; species confined to the eastern United States. 3. M. illudens. 
Spores 10-12 yw in diameter; species confined to the Pacific coast. 4. M. sphaerosporus, 
Pileus bay-red or somewhat darker. 5. M. marginatus. 
1. Monadelphus revolutus (Peck) Murrill, Mycologia 7: 282. 1915. 
Clitocybe revoluta Peck, Ann. Rep. N. Y. State Mus. 46: 103 (23). 1893. 
Pileus convex or nearly plane, often irregular, densely cespitose, occasionally solitary, 
2.5-7 cm. broad; surface glabrous, whitish and slightly striatulate on the margin when moist, 
white when dry, margin thin, commonly and irregularly revolute: lamellae thin, narrow, 
crowded, adnate or slightly decurrent: spores subglobose, 4-5 uw: stipe glabrous, solid when 
young, stuffed or somewhat hollow when old, whitish, 5-7 cm. long, 6-12 mm. thick. 
TYPE LocaLity: Alcove, Albany County, New York. 
Hasitat: On buried wood in woods. 
DistRIBuTION: Known only from the type locality. 
Exsiccatr: Shear, N. ¥. Fungi 103. 
2. Monadelphus caespitosus (Berk.) Murrill, Mycologia 3: 192. 
1911 
Lentinus caespitosus Berk. Lond. Jour. Bot. 6:317. 1847. 
Agaricus (Pleurotus) caespitosus Berk. & Curt. Jour. Linn. Soc. 10: 287. 1868. 
