Peziza michelii
https://www.mushroomexpert.com/Peziza_michelii.html
Ecology: Saprobic, or perhaps mycorrhizal; growing alone or gregariously, often near roadbanks, paths, and so on; May through September; apparently fairly widely distributed east of the Great Plains (my collections come from northern Michigan, Illinois, and Tennessee).
Fruiting Body: Goblet-shaped to cup-shaped when young, becoming saucer-shaped; 5-30 mm across; upper surface bald, lilac to purple; undersurface bald or very finely granular, nearly whitish at first, becoming yellowish, staining slowly yellow; stem absent; attached to the substrate at a central location; odor and taste not distinctive; flesh whitish to yellowish, when squeezed exuding a juice that stains surfaces slowly bright yellow to brownish yellow.
Spore Print: Not recorded.
Microscopic Features: Spores 13-17 x 7-9 ; at maturity warty; ellipsoid; biguttulate. Asci eight-spored; with blue tips in Melzer's reagent; up to 300 x 18 . Paraphyses with subclavate or merely rounded apices 3-6 wide.
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