Irish lichens
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Order: Pertusariales Family: Pertusariaceae
Species: Lepra albescens (Pertusaria albescens) Photos: On moss on Oak. Glengarriff, Co. Cork, SW Ireland. Very variable. Thallus can be thick or thin, pale grey to dark green-grey, +/- waxy, smooth to warted with a grey, often zoned margin. Scattered or contiguous paler soralia, disc-like or forming large clumps, KC-. Apothecia are very rare. P. albescens var. corallina, thicker thallus and coarser soralia. Frequent throughout Ireland on mature, lightly shaded trees. K-, C-, KC-, P-. Soralia KC-. Taste-test for oxalic acid negative. Similar: Pertusaria amara. Soralia KC+ violet. Taste-test positive. |
Pertusaria albescens November 2009