Astraeus hygrometricus is commonly known as the hygroscopic earthstar or the false earthstar.
Ecology: Commonly found in open or disturbed areas in woodlands; scattered to gregarious. Fruits from late fall to mid-winter but persisting in good condition for up to a year. Not edible. Distributed in America and Europe.
Fruit body: 1–5cm broad, round, outer wall gray to bown, exoperidium splitting into 6–15 pointed rays thick, leathery, the inner surface cracked, grey to brown becoming hard and leather-like when dry.
Spore sac: 1–3cm broad, globose, buf-brown pallid to dark greyish, thin and papery opening by a slit or tear forming an irregular pore. Gleba at first white and cocoa-brown at maturity.
Spores: brown, globose and finely warted, 7–10.5µ in diameter.
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