Habitat: Bovine, Equine Dung and Enriched Soils
Cap: 50+ mm in diameter, convex to broadly convex at maturity occasionally with acute umbo. Dark cinnamon brown maturing to golden brown. Surface dry lacking remnants of universal veil on cap (spots). Flesh white soon bruising bluish green.
Stem: 75-185 mm in length, yellowish to buff. Flesh bruising bluish green where injured. Persistent membranous annulus (ring) from partial veil that becomes dusted with purple brown spores at maturity.
Gills: Attachment adnate to adnexed. Grayish coloration in young fruit bodies becoming nearly black in maturity.
Spores: Dark purplish brown, deposits appear dark purple to nearly black
According to Ryche Hawk, Mazatapec was first "Picked around Mazatapec Mexico".