Lichen - Parmotrema perlatum, click for a larger image
Picture ©2010 Kay Newbury
University of Reading
Click photo for a larger image

Lichen - Parmotrema perlatum
Also known as - Black-edged Leaf Lichen
Previously known as - P. chinense

Many thanks to Kay Newbury at Reading University for the identification of this Lichen species - Parmotrema perlatum.

A relatively large, foliose species with smooth thallus, pearl-grey when dry, more greenish when damp, with very short, inconspicuous and often sparse, black, marginal cilia, underside black, with simple rhizines and a bare, tan-coloured zone towards the margin, soralia well delimited, marginal.  A widespread species growing on bark, frequently on Hawthorn or silica-rich rocks, to about 15cm (6in) in size, common in much of western and southern Britain, where until recently, it was largely absent from central and eastern England as a result of sulphur dioxide pollution, now rapidly recolonising these areas as pollution levels have dropped.

Basic species description for Lichens, other Lichen species in Brickfields Park.

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