Catathelasma imperialis (Fr.) Singer Cap 12-40cm across, convex becoming flat with an incurved margin at first; blackish brown to dingy brown; slightly sticky becoming dry and breaking into small areas or patches over the middle. Gills decurrent, close, narrow becoming broad; yellowish to pale greenish gray. Stem 120-180 x 50-80mm, tapers to a pointed base; covered with a dingy yellow-brown or pinky-brown membranous sheath; dry. Veil partial double veil leaving double ring on upper stalk; top layer membranous and striate, bottom layer slimy. Flesh hard, thick; white. Odor mealy. Taste mealy. Spores cylindrical, smooth, amyloid, 11-14 x 4-5.5ì. Deposit white. Habitat singly or scattered in dense coniferous forests. Found in the Rocky Mountains and the Pacific Northwest and Europe. Season August-October. Edible.