dcsimg

Comprehensive Description

provided by North American Flora
Boletus sphaerosporus Peck, Bull. Torrey Club 12 : 3^. 1885
Pileus circular, convex, 7-15 cm. broad ; surface smooth, glabrous, viscid, cream-colored when young, becoming reddish-brown with age; margin thin, even, regular, sterile, often iriflexed when dry, ornamented with portions of the veil : context pale-yellowish, becoming brownish with age : tubes adnate or somewhat decurrent, pale-yellow or yellowish-buff, becoming olive-brown or brown with age, tinged with green at times, mouths large, angular, uneven, shallow near the margin, edges thin, some of them elongated into coarse teeth : spores globose or broadly ellipsoid, 7.5-9^ long: stipe thick, equal, 3-7 cm. long, 1.5-3 cm. thick, reticulate at the apex only, or for half the distance downward, bearing near the base a very conspicuous white, membranous, sheathing, persistent annulus.
Type locality : Madison, Wisconsin.
Habitat : Low ravines and sandy places in woods, occasionally about stumps.
Distribution: Wisconsin, Iowa, and Minnesota.
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bibliographic citation
William Alphonso MurrilI, Gertrude Simmons BurIingham, Leigh H Pennington, John Hendly Barnhart. 1907-1916. (AGARICALES); POLYPORACEAE-AGARICACEAE. North American flora. vol 9. New York Botanical Garden, New York, NY
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