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Russula heterosporoides Murrill
Lloydia 7 (4): 320. 1945.

Original diagnosis

Pileo convexo-subdepresso, 6–8 cm. lato, glabro, pallido, striato, grato; lamellis confertis, albis; sporis ovoideis, levibus, albis, 5×3µ; stipite albo, glabro, 6–8×1.5–2.5 cm.

Pileus convex to slightly depressed, scattered, 6–8 cm. broad; surface moist, smooth, glabrous, dull-white, slightly yellowish at the center, margin entire, striate-tuberculate, peeling; context thin, firm, white, unchanging, odorless, mild; lamellae adnexed, few inserted, not forked, crowded, medium, broad, entire, white, unchanging; spores white, ovoid, smooth, about 5×3µ; stipe tapering downward, glabrous, white, unchanging, firm, solid, distinctly parallel grooved or lined, 6–8×1.5–2.5 cm.

Type collected by W. A. Murrill in dry soil under longleaf pine at Gainesville, Fla., Apr. 28, 1939 (F 19110). Suggesting R. heterospora Beards. and the indorous form of R. chlorinosoma in the sense of Singer.


Holotypus: 19110 (F)
North America: United States: Florida: Gainesville
In dry soil under longleaf pine

Published type studies: Hesler (1960).




SEM photos