Clitocybe avellaneialba Murr. New syn. Ampulloclitocybe avellaneolba Cap 5-20cm across, flat becoming sunken to funnel-shaped in age, with an inrolled margin that becomes wavy; olive-brown to grayish or blackish brown; smooth, finely felty or scaly. Gills decurrent, close, narrow; whitish to cream. Stem 50-180 x 10-30mm, stuffed, enlarged toward the base, sometimes curved; brownish, finely felty and furrowed. Flesh thicker on the disc, firm; whitish. Odor not distinctive. Taste not distinctive. Spores broadly spindle-shaped, smooth, nonamyloid, 8-11 x 4-5.5ì. Deposit white. Habitat in groups or clusters on or near rotting logs and debris of alder and conifers. Quite common. Found in the Pacific Northwest and California. Season September-December. Not edible.