Voucher IPL2870
On the riparian zone of the Boise river, with Populus tremuloides and willows.
Cap 10 cms., convex later depressed, slightly viscid, yellow-brown to orange, tomentose at first later smooth, margin incurved, later straight. Unchanging with KOH.
Stipe short, narrow at the tip, hard, with small scrobicules. Gills subdecurrent, crowded, cream, highly forked near the stipe. Latex white, scanty, unchanging. Taste acrid.
Spore print white, with a pinkish tint. Spores (7.0-8.2) x (5.3-5.9); ellipsoid, warts .5 mic high, connected 2 or 3 at the time (Voo B1-B2).
Basidia (46-48-9.0), Pleuromacrocystidia (52-62) x (8.0) subfusiform apex acute, Cheilocystidia (24.0 × 4.7).