Hebeloma californicum Murrill 1917

Hebeloma californicum Murrill, sp. nov
Pileus thick, fleshy, irregular, convex to subexpanded, broadly umbonate, gregarious, 7-9 cm. 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 n; stipe equal or tapering upward, shiningwhite or grayish, solid, ornamented with coarse fibrils, often split or cracked, 5-10 cm.
long, 1.5-3 cm. 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.