Helvella vespertina is a species of fungus in the family Helvellaceae.

The gray-to-black cap varies in its gnarled shape, measuring about 2–7 centimetres (1–3 inches) tall and wide.

The stem may be twisted or holed, from 4–15 cm (1+1⁄2–6 in) tall and 2–3 cm (3⁄4–1+1⁄4 in) thick, varying in color to be dark like the cap, bright white, or faded between two shades, and can display yellowish spots.

[1] It is found in Western North America under conifers[2] from September to March.

[1] The parasitic Ascomycete fungus Hypomyces cervinigenus may colonise H. vespertina, often producing a white moldy appearance.