Habitat: Enriched Soils
Strain Origin: Oak Ridge, TN
Cap: 25-75 mm in diameter, hemispheric to convex expanding to broadly convex to nearly plane with age. Dark red maturing to golden brown. Fine fibrillose veil remnants when young that soon disappear. Flesh white soon bruising bluish green.
Stem: 150-200+ mm in length. Typically equal, sometimes slightly enlarged at base, sometimes contorted. Yellowish to buff with a reflective sheen, bruising bluish, hollow. Partial veil membranous leaving a persistent membranous annulus that is well dusted with purplish brown spores even before tearing away from the cap.
Gills: Attachment adnate to adnexed. Grayish coloration in young fruit bodies becoming nearly black in maturity.
Spores: Dark purplish brown, subellipsoid, 13 by 8 micrometers on 4-spored basidia
Originally collected by Jeetered from equine dung, five miles west of the Y12 National Nuclear Laboratory in Oak Ridge, Tennessee. This is the northernmost collection recorded for this species, and the variety is particularly cold-hardy and disease resistant.