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Picture ©2010 Kay Newbury
University of Reading
Lichen - Physconia grisea
Family - Hysciaceae
Many thanks to Kay Newbury at Reading University for the identification of this Lichen species - Physconia grisea.
A grey-brown "leafy" lichen that grows usually grows on bark. The tips of each lobe are covered in small white granules called prunia that look like a dusting of sugar. Occurs on bark - occasionally on rock.
Basic species description for Lichens, other Lichen species in Brickfields Park.
A foliose lichen. Thallus is pale grey or brownish when dry but greener when wet, usually coarsely pruinose. Fan-shaped, overlapping lobes, under surface whitish with pale, simple rhizines (the only Physconia species with pale). Granular soralia may spread to cover the thallus centre. Apothecia are rare. Found on nutrient-rich and often dusty, rocks, cement and trees.
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