Pileus (Cap): 2.5-10cm across, convex becoming flatter with an inrolled margin; buttons pinky-brown lilac then dull greenish or bluish green, blue and yellow mixed; dry, slightly hairy or scaly around the disc, becoming smooth in age.
Lamellae (Gills): adnate to sinuate, close to subdistant, broad; olive-yellow when young, becoming dotted with yellow or rusty-red stains in age, particularly at the edges.
Stipe (Stem): 2100-150 x 5-l0mm, stuffed then hollow; same color as cap, staining brownish yellow or olive-ochre within; wavy, lined. No Veil. Flesh thin at the edge; greenish yellow. Odor pleasant, not distinctive. Taste very bitter.
Microscopic features: Spores 4-5.5 x3.5-4 um, mostly ovoid or subovoid, some short ellipsoid in face view, slightly inequilateral in profile, verrucolose to somewhat asperulate, with an apiculate hilum, no germ pore, dextrinoid. Basidia 27-34 x 5-7 um, 4 spored. Pleurocystidia 27-43 x 3-5 um, slender- ventricilose, colorless capitate; basidioles 23-30 x 3.5 um clavate brown; cheilocystidia 20-30 x 3-4 um ventricose, capitate, more rarely filform. Gill trama subparallel hyphae 4-8 um broad. Pileus trama radial. Cuticle a repent zont of brown hyphae, bearing a tuft of slender, erect, filamentous to subventricose, capitate pileiocystidia 36-57 x 1.5 -3 um. Clmap connections present. Pileus and gill trama reddish brown in KOH, and in Melzer's reagent; hymenium dark red in KOH. Caulocystidia 18-42 x 4-7 um, flask shaped or ventricose, neck often slender, capitate or more commonly non-capitate, forming a tuft. Yellow pigment soluble in KOH, present int he gill trama.
Season: August through December.
Habitat and Distribution: On coniferous woodm debris, and rich humus. Idahp, Washington, Oregon, and California
Growth Habit: Gymnopilus purpuratus is found growing solitary to gregariously or in small clusters
Bruising: Green or blue bruising at the base and on the pileus, green spots on the pileus likely.
Other Notes: Odor agreeable or non distinctive, taste very bitter.
The description of microscopic characters in based on a study of the type of Cortinarius punctifolis pk. Smith recognized that this species and Murrill's Flammula subviridis were one and the same. The pileus colors, and dotted gills, and filiform pileocystidia are distinctive. Many of the dried basidiocarps retain blue-green to green tints.