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Green Elfcup

Chlorociboria aeruginascens

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Appears in
Mushrooms

By Roger Phillips

Published 2006

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Green Elfcup Chlorociboria aeruginascens (Nyl.) Kanouse ex C.S. Ramamurthi, Korf & L.R. Batra. syn Chlorosplenium aeruginascens (Nyl.) P. Karst. (illustrated 90% life size) Fruit body 1–5mm across, cup-shaped then flattened, attached to substrate by a short stalk, margin wavy, irregular; bright blue-green throughout. Spores 6–10Γ—1.5–2ΒΌ, fusiform, containing 2 small oil drops at opposite ends of the spore. Asci 70Γ—5ΒΌ. Habitat on fallen branches of deciduous trees, especially oak; mainly autumn although also found in spring to autumn. Very common. Not edible. The mycelium growing through the wood stains it conspicuously blue-green: this stained wood is often seen, but the fruit bodies are less frequent. The infected wood, known as β€˜green oak’, was once much used in the manufacture of Tunbridge ware, in which woods of different colours were arranged into a pattern, compressed, then cut transversely into thin strips of veneer.

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