Part 3, 1917] AGARICACEAE 189 
11. Pluteolus californicus McClatchie, Proc. So. Calif. Acad. Sci. 
1: 383. 1897. 
Pileus campanulate or ovoid to expanded, 2.5-5 cm. broad and 1-3 em. high; surface 
viscid when moist, cream-colored or reddish; lamellae free, crowded, thin, 2-5 mm. wide, cream- 
colored, white on the edges; spores ellipsoid, 12-18 X 7-9 u; stipe fragile, subequal, hollow, 
villose-pulverulent or pruinose, 2.5-5 cm. long, 2-3 mm. thick. 
TYPE LocaLity: Compton, California. 
Hasrtat: On dead stems and manure. 
DistRIBuTION: Compton and Wilmington, California. 
12. Pluteolus stramineus Murrill, Mycologia 4: 246. 1912. 
Pileus thin, convex, solitary, 5 cm. broad; surface glabrous, viscid, flavous and rugose at 
the center, pale-stramineous and closely and conspicuously striate from the central area to the 
margin; lamellae narrow, free or slightly adnexed, twice inserted, dull-dirty-stramineous; 
spores ovoid, smooth, bright-ochraceous-melleous under a microscope, 11-14 X 6-8 y; stipe 
perfectly straight, cylindric, equal, fleshy, smooth, stramineous, pulverulent above, hollow, 
10 cm. long, 5 mm. thick. 
Types Locatrty: Corvallis, Oregon. 
Hasitat: In an open grassy yard after a light rain. 
DISTRIBUTION: Known only from the type locality. 
13. Pluteolus luteus Peck, Bull. Torrey Club 22: 203. 1895. 
Pileus thin, very fragile, at first subovoid, then convex or subcampanulate, gregarious, 
2-3.5 cm. broad; surface glabrous, viscid, yellow, margin slightly striate; lamellae numerous, 
crowded, free or but slightly adnexed, yellowish, becoming ferruginous; spores ellipsoid, 
10-12.5 X 6-7.5 uw; stipe slender, hollow, slightly thickened toward the base, yellowish, the 
apex striate and sprinkled with mealy particles, 3.5-7.5 cm. long, 2-4 mm. thick. 
TyPE Locality: Pasadena, California. . 
Hasirat: Under trees on decaying manure and in grass. 
DistTRIBUTION: California. 
14. Pluteolus parvulus Murrill, Mycologia 4: 246. 1912. 
Pileus convex to subplane, thin, solitary, scarcely 1 cm. broad; surface smooth, glabrous, 
shining, slightly viscid, dark-avellaneous, the small wmbo concolorous, margin striate; lamellae 
free, ventricose, broad, fulvous, the edges white and minutely serrulate; spores ellipsoid, 
regular, smooth, bright-melleous under a microscope, 9-11 X 5 uw; stipe enlarged at the apex, 
pulverulent above, glabrous below, smooth, straw-colored, hollow, flaccid and collapsing, 
2 cm. long, 1 mm. thick. 
Tyrer Locality: Preston’s Ravine, near Palo Alto, California. 
Hazrat: In humus on the ground in woods. 
DISTRIBUTION: Known only from the type locality. 
15. Pluteolus jamaicensis Murrill, sp. nov. 
Pileus broadly convex to plane, thin, not umbonate, solitary, 3-4 em. broad; surface 
dry, glabrous, isabelline on the disk, fading to pale-yellowish on the margin, which is entire, 
not incurved on drying; context with a distinctly mealy odor; lamellae very narrow and 
mutch crowded, free or slightly adnexed, thin, pale-melleous, pallid and entire on the edges; 
spores ellipsoid or ovoid, smooth, pale-yellow, 9-10 X 7-8 u; stipe long, equal, whitish, gla~ 
brous, solid or stuffed, 10 cm. long, 5 mm. thick. 
Type collected on a compost heap of vegetable remains and mud by the roadside at 
Mose Towa: Jamaica, December 16, 1908, W. A. & Edna L. Murrill 171 (berb. N. Y. Bot. 
Gard.). ; 
Distrrsvrion: Known only from the type locality. 
DOUBTFUL SPECIES 
Pluteolus aleuriatus (Fries) P. Karst. Bidr. Finl. Nat. Folk 32: 291. 1879. (Agaricus 
aleuriatus Fries, Obs. Myc. 1: 49. 1815.) Reported from New York by Peck and from 
