Caloplaca obscurella Teloschistaceae
Caloplaca obscurella

Growth type crustose
Chemical results: Negative. Thallus, soredia and apothecia K-

Inconspicuous but common on dusty or nutrient-rich basic bark.

Thin pale to dark grey-green thallus (brighter green when wet) with scattered or contiguous crater-like soralia. Soredia grey-green to bluish-grey. Apothecia are rare, small and Lecania-like, discs brownish, the margins soon excluded.

Similar: Caloplaca ulcerosa

Caloplaca obscurella
Caloplaca obscurella
Filcombe Farm, Dorset. November 2013

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