Description
Immature fruit bodies of P. indusiatus are initially enclosed in an egg-shaped to roughly spherical subterranean structure encased in a peridium. The "egg" ranges in color from whitish to buff to reddish-brown, measures up to 6 cm (2.4 in) in diameter, and usually has a thick mycelial cord attached at the bottom. As the mushroom matures, the pressure caused by the enlargement of the internal structures cause the peridium to tear and the fruit body rapidly emerges from the "egg". The mature mushroom is up to 25 cm (9.8 in) tall and girded with a net-like structure called the indusium (or less technically a "skirt") that hangs down from the conical to bell-shaped cap. The netlike openings of the indusium may be polygonal or round in shape. Well-developed specimens have an indusium that reaches to the volva and flares out somewhat before collapsing on the stalk. The cap is 1.5–4 cm (0.6–1.6 in) wide and its reticulated (pitted and ridged) surface is covered with a layer of greenish-brown and foul-smelling slime, the gleba, which initially partially obscures the reticulations. The top of the cap has a small hole. The stalk is 7–25 cm (2.8–9.8 in) long, and 1.5–3 cm (0.6–1.2 in) thick. The hollow stalk is white, roughly equal in width throughout its length, sometimes curved, and spongy. The ruptured peridium remains as a loose volva at the base of the stalk. Fruit bodies develop during the night, and require 10–15 hours to fully develop after emerging from the peridium. They are short-lived, typically lasting no more than a few days. At that point the slime has usually been removed by insects, leaving the pale off-white, bare cap surface exposed. Spores of P. indusiatus are thin-walled, smooth, elliptical or slightly curved, hyaline (translucent), and measure 2–3 by 1–1.5 μm.
Read more about this topic: Phallus Indusiatus
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