St George’s Mushroom

Calocybe gambosa

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Mushrooms

Mushrooms

By Roger Phillips

Published 2006

St George’s Mushroom Calocybe gambosa (Fr.) Donk. syn. Tricholoma gambosum (Fr.) P. Kumm. syn. Tricholoma georgii (L.) Quél. syn. Lyophyllum gambosum (Fr.) Singer (illustrated 35% life size) Cap 5–15cm across, subglobose then expanding, often irregularly wavy and sometimes cracking, margin inrolled; white. Stem 20–40×10–25mm; white. Flesh white; soft; taste and smell mealy. Gills narrow, very crowded; whitish. Spores 5–6×3–4¼, elliptical. Spore print white. Habitat in pastureland or grass on roadsides and at wood edges; found traditionally on 23 April, St George’s Day, whence it gets its common name, although more frequently maturing a week or so later. Common. Edible good.

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