Parr 3, 1917] AGARICACEAE 225 
40. Hebeloma dryophilum Murrill, sp. nov. 
Pileus rather thin, convex to expanded, somewhat umbonate or gibbous, solitary, 2-2.5 
em. broad; surface viscid, glabrous, smooth, cream-colored, darker on the disk, margin entire, 
concolorous; context white, without characteristic odor or taste; lamellae sinuate, rather 
crowded, broad, dark-cream-colored to subfulvous; spores ellipsoid, smooth, melleous under 
the microscope, 8-9 & 5-6 n; Stipe slightly enlarged at the base, fleshy, white, smooth, finely 
fibrillose below, 4-5.5 em. long, 4-6 mm. thick. 
Type collected among dead oak lea: at Stanford Uni i i i 
GP Vee eee ea Stanfor niversity, California, December 14, 1901, 
Distrisution: Known only from the type locality. 
41. Hebeloma Harperi Murrill, sp. nov. 
Pileus convex to plane or slightly depressed, not umbonate, rather thin, gregarious, 4-5 
cm. broad; surface glabrous, viscid, smooth or somewhat cracked, isabelline to reddish-brown 
with a silvery sheen, margin entire, concolorous, not striate; lamellae sinuate, crowded, rather 
narrow, clay-colored to subfulvous, entire and concolorous on the edges; spores ovoid, smooth, 
pale-yellowish under the microscope, dark-clay-colored in mass, 9-10 X 5-6 y; stipe equal, 
silvery-white, slightly squamulose, 3-4 cm. long, 5-10 mm. thick. 
Type collected in rich black soil on a lawn at Berkeley, California, February 20, 1911, R. A. 
Harper 55 (herb. N. Y. Bot. Gard.). 
DISTRIBUTION: Known only from the type locality. 
42. Hebeloma Bakeri Earle, Bull. N. Y. Bot. Gard. 2: 342. 1902. 
Pileus expanded, solitary, 5-7 cm. broad; surface distinctly viscid, glabrous, cream- 
colored, darker on the disk, margin entire; context white or cream-colored, unchanging, the 
taste and odor mild; lamellae deeply sinuate, heterophyllous, crowded, subventricose, pale- 
ochraceous-brown, the edges white and suberoded; spores ellipsoid-ovoid, 10-12 X 6-7 n, 
usually with a large central vacuole; stipe long, equal, subglabrous at the base, pruinose at 
the apex, concolorous, solid, about 8 cm. long and 7 mm. thick. 
TyPE Locality: Stanford University, California, 
Hapirat: On the ground in woods or groves. 
DISTRIBUTION: Pacific coast. 
43, Hebeloma cremeum Murrill, sp. nov. 
Pileus convex to expanded, slightly gibbous, solitary, 5-7 cm. broad; surface viscid when 
young but soon becoming dry, perfectly smooth and glabrous, resembling dressed kid, uni- 
formly cream-colored, margin entire, concolorous; context pure-white, without characteristic 
taste or odor; lamellae broadly sinuate, crowded, ventricose, pale-chocolate-brown at maturity, 
entire and concolorous on the edges; spores ellipsoid, smooth, brown in mass, rather dark for 
the genus, pale-ferruginous under the microscope, 12-13 K 6-7 4; stipe subequal, fleshy, 
longitudinally striate, glabrous, dull-cream-colored, white at the apex, 8-9 cm. long, 7-12 mm. 
thick; veil membranous, slight, remaining attached in fragments to the margin. 
Type collected in old pastures near Palo Alto, California, March 11, 1902, C. F. Baker 379 
(herb. N. Y. Bot. Gard.). . . 
DISTRIBUTION: Southern California. 
44. Hebeloma californicum Murrill, sp. nov. 
Pileus thick, fleshy, irregular, convex to subexpanded, broadly umbonate, gregarious, 
7-9 em. broad; surface glabrous, grayish-white to cream-colored, smooth on the disk, striate 
and becoming cracked toward the margin, which is entire to undulate or lobed, concolorous, 
ornamented with the remains of a slight arachnoid veil; context rather thin, white; lamellae 
sinuate, very broad, subcrowded, white, becoming yellowish and finally yellowish-brown; 
spores ellipsoid, smooth, pale-ferruginous, 10-12 X 6; stipe equal or tapering upward, 
shining-white or grayish, solid, ornamented with coarse fibrils, often split or cracked, 5-10 cm. 
long, 1.5-3 em. thick. 
Type collected in clay soil near oak trees on Jasper Ridge, Stanford University, California, 
March 26, 1916, James McMurphy 218 (herb. N. Y. Bot. Gard.). 
DisTRIBUTION: Southern California. 
