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Parmeliella parvula P.M. Jorg.

Parmeliella jamesii Ahlner & P.M. Jorg.

Description

     Thallus foliose to squamulose, which can form rosettes 2-4 cm in diameter, arranged on a very visible dark blue hypothallus (at least at the margin), formed of large squamules 1-2 mm long with crenulate ends, closely applied to the substrate, gray-blue, gray-bluish brown, lead gray; granular or isidiate-shaped marginal soralia which may cover the entire center of the thallus, forming a crust and leaving only a crown of lobes or squamules at the margin. Apothecia very rare, 0.3-0.6 mm in diameter, disc concave to plane, brown-red. Colorless spores with a finely warty epispore, 15-18 x 10-12 µm. Species of oceanic climates with mountainous tendencies coming among the bryophytes on the trees and more rarely the rocks.

Parmeliella parvula Pyrénées Cauterets 1
Bernard BOUFFINIER

Parmeliella parvula Pyrénées Cauterets 2
Bernard BOUFFINIER

Parmeliella parvula Pyrénées Cauterets 3
Bernard BOUFFINIER

Parmeliella parvula Pyrénées Cauterets 4
Bernard BOUFFINIER

Parmeliella parvula Pyrénées Cauterets 5
Bernard BOUFFINIER

Parmeliella parvula Pyrénées Cauterets 6
Bernard BOUFFINIER

Parmeliella parvula Pyrénées Cauterets 8
Bernard BOUFFINIER