in Jahns, Biblthca Lichenol. 38: 264 (1990).
Basionym: Lichen plumbeus Lightf., Fl. Scot. 2: 826 (1777).
Type locality coordinates: Data lacking.
Type locality photo: Data lacking.
Type scan: Data lacking.
Molecular barcode: Data lacking.
Thallus: plate-like, monophyllous, thick and rigid, forming more or less orbicular, placodioid patches 5 - 10 cm in diameter, lobes mostly contiguous for entire length, rounded at apices, scarcely indented with thickened, ascending margins; upper surface blue-grey, occasionally browinsh or olivaceous, with prominent longitudinal ridges and concentric, lateral, crescent-shaped curves, giving the lobes a scallap-like appearance; lower surface with a prominent, blue-black, beard-like hypothallus. Soredia and isidia absent.
Photobiont: Data lacking.
Chemistry: No lichen substances.
Ecology: On bark of Pinus canariensis and on earth at roadsides in shady places in the western Canary Islands.
Distribution type: Data lacking.
Taxonomy: Data lacking.
Note:
Consortium of North American Lichen Herbaria
Lichens of the Pacific Northwest
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