Cortinarius corrugatus Pk. subgenus Myxacium Cap 5-10cm across, obtuse to campanulate, then expanding; tawny ochre to rust-brown; surface viscid, coarsely and prominently radially wrinkled or corrugated. Gills adnexed; violaceous when very young but soon cinnamon brown. Stem 60-120 x 10-20mm, with a small rounded bulb at base; tawny below, paler above; distinctly viscid over lower half; cortina fine, white, soon disappearing. Flesh firm; white to buff. Odor pleasant. Taste pleasant. Spores warty, 12-15 x 7-9µ, quotient 1.7. Deposit rust-brown. Habitat scattered in moist deciduous woods, especially beech. Not very common. Found east of the Great Plains. Season August-October. Not edible. Comment Although this species is often placed in the subgenus Phlegmacium, the wrinkled cap and viscid stem place it in Myxacium.