Green Elfcup - Chlorociboria


Green a beautiful blue-green cup fungus. The cups can be stalked or unstalked and are 2 to 6 mm in diameter. It is more common to see the green stained wood than to actually see the fruiting bodies. Chlorociboria aeruginascens and Chlorociboria aeruginosa both produce simlar green cups and the two can only be separated by microscopic examination, (although Chlorociboria aeruginosa is by far the rarer of the two). For this reason we have treated the two species as an aggregate .

Similar Species

Chlorociboria aeruginosa

Identification difficulty

On fallen branches of deciduous trees, especially oak.

When to see it

Mainly autumn, but occasionally seen at other times throughout the year.

Life History

The mycelium growing through the wood stains it conspicuously blue-green.

UK Status

Widespread and fairly frequent in Britain.

VC55 Status

Fairly frequent in Leicestershire and Rutland, although exact data is difficult to obtain due to difficulty of identification.

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map

Species profile

Species group:
Records on NatureSpot:
First record:
16/08/2013 (Nightingale, Kate)
Last record:
29/11/2023 (Graves, Hazel)

Total records by month

% of records within its species group

10km squares with records

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