THE AGARICACEAE OF THE PACIFIC 
COAST— IV. NEW SPECIES OF CLI- 
TOCYBE AND MELANOLEUCA 
William A. Murrill 
Both of these genera are large and difficult, the former being 
characterized by decurrent or adnate gills and the latter by sin- 
uate or adnexed gills. Tricholoma (Fries) Quel, is antedated 
by Tricholoma Benth., so Mclanoleuca Pat. must be substituted 
for this familiar name; but combinations with Tricholoma are 
made for those desiring to continue its use. 
Clitocybe albicastanea sp. nov. 
Pileus convex, gibbous, at length expanded, gregarious or 
growing in incomplete fairy rings, 1.5-4 cm. broad; surface white, 
smooth, glabrous, moist, margin entire, concolorous; context thick 
at the center, very thin near the margin, white, without charac- 
teristic taste or odor; lamellae narrow, distant, slightly arcuate, 
decurrent, white, bay to dark-chestnut in dried specimens ; spores 
ellipsoid, smooth, hyaline, 7-8.5 X 4-5-5 ; stipe cylindric, equal, 
smooth, white, glabrous, solid, 3.5-5 cm. long, 3-7 mm. thick. 
Type collected among leaves under oaks near Searsville Lake, 
California, December 28, 1902, James McMurphy 61. 
Clitocybe albiformis sp. nov. 
Pileus thick, firm, convex, cespitose, 5-9 cm. broad; surface 
nearly smooth, dry, glabrous, white, slightly cremeous at the 
center, margin entire, concolorous, strongly inflexed on drying; 
context thick, white, with the odor and taste of the ordinary 
field mushroom ; lamellae distinctly decurrent, rather broad and 
close, several times inserted, plane or arcuate ; spores globose, 
smooth, hyaline, 2-3 /u,; stipe cylindric to ventricose, tapering 
upward at times, white, solid, slightly fibrillose below, finely 
tomentose above, 9-16 cm. long, 1-2.5 thick. 
Type collected in humus under redwoods near Searsville Lake, 
California, January 6, 1903, James McMurphy j. This species 
206 
