Cololejeunea calcarea

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Identification notes

This species and C. rossettiana are very similar in habit and habitat. Once known, its pale green patches of densely interwoven shoots are eye-catching and conspicuously opaque due to its mamillose leaf cells, which scatter the light. With practice, its shoots can be seen to look less prickly under the hand-lens or stereomicroscope than C. rossettiana but it’s always sensible to collect a small sample (if there is enough) to confirm microscopically.

Read the Field Guide account

Distribution in Great Britain and Ireland

C. calcarea is more widespread everywhere except southern England and a few places where the two species overlap in distribution e.g. the Wye Valley.

View distribution from the BBS Atlas 2014

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