106. Russula brunneola Burlingham, sp. nov.
Pileus convex-umbilicate, then plane to depressed, up to 10 cm. broad; surface varying from Vandyke-brown to brownish-drab or burnt-umber, sometimes tinged with vinous purple, rarely with olive-brown, paler when mature, viscid when moist, the cuticle separable on the margin, pruinose when young, glabrous; margin involute, soon striate-tuberculate: context rather firm, tinged with brownish or slate-violet under the cuticle, otherwise white, mild, the odor none; lamellae white, becoming yellowish in drying, the edges sometimes tinged with Vandyke-brown, pruinose, forking near the stipe or a little distance away, venose-connected, equal, acute at the inner ends, rounded at the outer, close, rather broad; stipe white or tinged with slate-violet, nearly equal, glabrous, spongy, 4–6 cm. long, 1.5–2 cm. thick: spores white, globose to elliptic, very minutely echinulate, 5–6 × 6–8 µ.
Type collected among spruce needles near a wood road under spruces and yellow birch saplings at Stratton, Vermont, August 7, 1911, Gertrude S. Burlingham 99-1911 (herb. Burlingham).
Holotypus: Herb. Burlingham: Gertrude S. Burlingham 99-1911
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