Parmotrema perlatum


A relatively large and leafy lichen, often with convoluted lobes with soredia on their edges. It is pearly grey when dry, but greener when damp. If the cortex is scraped, a drop of K on the white medulla will turn yellow-orange (the similar-looking Hypotrachyna go red).

Identification difficulty

Usually on tree trunks but sometimes on rocks.

When to see it

All year round.

UK Status

Widespread, common in much of western and southern Britain; until recently largely absent from central and eastern England as a result of sulphur dioxide pollution, but now rapidly re colonising these areas as levels have dropped.

VC55 Status

Probably increasing in Leicestershire and Rutland.

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Leicestershire & Rutland Map


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

UK Map