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Black Trumpet
The black trumpet of eastern North America: a thin, gray to black, vase-shaped fungus with no separate cap or stem, often in moss under oaks. It is a choice edible. ITS data show it is distinct from the European C. cornucopioides, which has a white spore print.
Edible and choice (Wikipedia), though thin-fleshed. No poisonous look-alikes are reported in the sources consulted; other dark Craterellus are similar, and the spring devil's urn (Urnula craterium) is more cup-shaped (Forager Chef). The hollow, black, gill-less trumpet is distinctive. Discard shriveled or very dark old specimens.
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Mycology is an evolving science: names, classifications and safety information change as research advances. Entries are compiled from cited sources and reviewed, but may be incomplete or out of date — check the sources, and never rely on this library alone to identify or eat a mushroom.
