Lactarius imperceptus Beardslee & Burlingham. Cap 3-8cm across, broadly convex or bell-shaped, with a slight umbo and a striate margin in mature specimens; pale to dark fawn; sticky when wet, smooth. Gills slightly decurrent, close, broad, narrowed and sometimes forked at the stem; white, tinted pale rose, sometimes staining brownish. Stem 30-80 x 7-15mm, solid; pinkish buff with soft, dense, whitish hairs on the base. Flesh bruises sulphur yellow. Latex watery, white, changing slowly to sulphur yellow. Odor none. Taste bitter becoming peppery. Spores broadly ellipsoid, amyloid, 7-10 x 6-8µ; ornamented with heavy bands forming a partial reticulum, prominences 0.5-1.5µ high. Deposit white to pale cream but rather variable. Habitat on soil or occasionally rotting logs under oak, pine, maple, or sweet gum. Found in Florida and widely distributed east of the Great Plains. Season July-October. Not edible.