Galapagos Species Database

Thallus olive green to blackish grey when dry, darker when wet, foliose, adnate to ± loose, moderately thick; outline irregular; lobes indistinct, broad; surface smooth, dull, irregularly nodulose, but not broadly pustulate, occasionally fenestrate; lacking true isidia, but often broadly lobulate with conch-like ascending lobes; apothecia sessile, laminal, expanded; disk deep reddish brown, flattened to becoming slightly convex; margin lecanorine, concolorous with thallus, with a broad, loosely prosoplectenchymatous outer thalline exciple, and a distinct inner paraplectenchymatous proper exciple; ascospores vermiform, with rounded ends, ± coiled inside the ascus, typically 3-5 septate, 35-40 x 3-5 μm.

The species can easily be recognized by the strongly nodulose thallus with abundant, slightly convex apothecia and vermiform spores that are often ± coiled inside the ascus.