Aseroe coccinea

Like all Phallaceae species, A. coccinea begins its development in the form of a roughly spherical whitish "egg" that is 10–15 mm (0.39–0.59 in) in diameter, lying on or partially submerged in the substrate. On the base of the egg is a white strand of mycelium. The exoperidium (the outer tissue layer) is white to cream-colored with a fibrous surface. The inner layer is membranous, with a hyaline (translucent) endoperidium (inner tissue layer). The slimy spore-bearing mass, the gleba, is olive-brown to greenish-black, with a slightly fetid odor. When the mushroom is mature, it covers the upper surface of a disc on the top of the receptacle. The receptacle has a cylindrical stipe, 10–15 mm (0.39–0.59 in) tall, 7–15 mm (0.28–0.59 in) in diameter at the top, somewhat fusiform (tapered at both ends) or sometimes just tapered towards the base. The stipe is pale pink near the top, white to cream at the base, spongy in texture, and hollow. The top of the receptacle is flattened to form a disc that bears 7–9, narrow, tapering "arms". The arms consist of a single bright red tube-like chamber, that is 4–10 mm (0.16–0.39 in) long and 0.7–2 mm (0.0–0.1 in) thick.

The thick-walled spores are ellipsoid to cylindrical, and measure 4–5 by 2–2.5 μm. They are hyaline (translucent), have a smooth surface, and are sometimes truncated at the base. …

Although Kasuya did not explicitly define the mode of nutrition for A. coccinea, most Phallaceae species are suspected to be saprobic—decomposers of wood and plant organic matter. The fruit bodies of A. coccinea, known only from temperate regions of Japan (Tochigi Prefecture), grow solitarily or in groups on rice husks, straw, or dung. They are found from summer to autumn.