A NEW BOLETE FROM CALIFORNIA 
William A. Murrill 
In a collection of boletes recently received -from the depart- 
ment of botany of the University of California, the following is 
not only new but also of special interest because of its rather 
unusual characters ; 
Rostkovites californicus sp. nov. 
Pileus thick, convex to plane, solitary, 6-9 cm. broad ; surface 
smooth, conspicuously subtomentose, brown, margin concolorous, 
entire, rather thick ; context thick, fleshy, flavous, unchanging, 
taste mild ; tubes adnate, plane or slightly convex in mass, 4-6 
mm. long, yellow, exuding drops which blacken with age, mouths 
large, angular ; spores oblong-ellipsoid, smooth, yellowish-brown, 
7-8 X 3-5-4 /-<■; stipe subequal or bulbous, smooth, yellow, with 
black dots, unchanging, solid, yellow within, unchanging, 3-6 cm. 
long, 1.5-2 cm. thick. 
Type collected on the ground in pine woods in Grass ^'alley, 
California, November 12, 1914, H. S. Yates & F. H. Bolster 2^1 
(herb. N. Y. Bot. Card.). Excellent field notes accompany the 
specimens. The species is strikingly different from other mem- 
bers of the genus in having a conspicuously subtomentose surface 
resembling that of Ceriomyces communis. 
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