Phallus impudicus

Species developing in soil under broadleaved trees or firs, initially hypogeous as an egg 3 to 4 cm across, expanding at maturity up to nearly 20 cm in height, with a tall spongy stipe, a conical pileus, whitish with greenish tints from the gleba, and a pungent, fetid odour.

Endoperidial hyphae filamentous, 1.5 to 3 µm wide, widely spaced in a gelatinous matrix, with brown intracellular pigment, septate with clamp connections.

Exoperidial hyphae compacted, slightly interwoven, containing pale brown intracellular pigment, 2 to 4 µm wide, septate with clamp connections.

Cystidia absent.

Basidia cylindrical-clavate, 20 to 25 µm long, 4 to 5 µm wide, clamped at the base, bearing 6 to 8 sterigmata.

Spores ellipsoidal, smooth, hyaline, pale yellowish-brown under the microscope, 3.5 to 4.5 µm long, 1.5 to 2 µm wide, containing one or two oil droplets at the poles, inamyloid in Melzer's reagent.