Summary: Features include 1) a cup-shaped to flat fruitbody with a very dark brown upper surface, and with a similar color on the scurfy underside, 2) absent stem, 3) growth on the ground, on burned ground or burned wood, or on rotten cloth, and 4) microscopic characters.
Microscopic: spores 19-22 x 12-13 microns, broadly elliptic, smooth, colorless, without droplets; asci 8-spored, 260-280 x 18-20 microns, positive reaction to iodine; paraphyses cylindric, tips with clavate widenings to 10 microns, (Breitenbach), spores 18-20 x 11-12 microns, elliptic, smooth, without droplets; asci 280-300 x 16-18 microns; paraphyses straight, simple, tip rounded, 5-8 microns wide, (Dennis), spores 18-22 x 11-13 microns (Hansen)
Notes: Peziza sepiatra is found at least in BC and CO, (Larsen), Switzerland (Breitenbach), United Kingdom (Dennis), and Norway (Hansen).
Habitat and Range
Habitat
single on "ground along the edges of paths, in pastures and fields of tall perennials", according to the literature on burned ground and rotten cloth, summer, (Breitenbach), on soil, charcoal, and rotting textiles, (Dennis), on burned ground (Hansen)