Russula betulina Burl. 1915

Russula betulina Burlingham, sp. nov
Pileus convex-umbilicate, then plane to depressed, 6-9 cm. broad; surface yellowishsalmon to reddish-salmon, salmon-flesh, or ^Etruscan-red, usually paler in the center, becoming deeper colored with age, viscid when moist, glabrous; margin even at first, then striatetuberculate: context colored like the surface next to the cuticle, otherwise white, rather firm, taste mild, odor none; lamellae white, then maize-yellow, mostly equal, forking near the stipe, acute at the inner ends and rounded at the outer, close; stipe white, nearly equal, firm, stuffed, becoming spongy, glabrous, 3.5-7 cm. long, 1-2 cm. thick: spores ochraceous, broadly elliptic, echinulate, 8.7 X 12.2 ju or smaller.
Type collected in rather sandy, black, vegetable soil in a moist place under yellow birch at Newfane, Vermont, July 5, 1911, Gertrude S. Burlingham 28-1911 (herb. BurHngham). Distribution: Vermont and Colorado.