Relicina limbata (Laurer) Hale

Relicina limbata

Relicina limbata (Laurer) Hale, 1974:484.

Parmelia limbata Laurer, 1827:39 [type-collection: Australia, Sieber (M, lectotype)].

Parmelia sphaerospora Knight, 1882:49 [type-collection: Sydney, Australia, Knight (H, lectotype) (not Parmelia sphaerospora Nylander, 1859:254)].

Parmelia insinuata Nylander, 1886:324 [based on Parmelia sphaerospora Knight].

Thallus adnate to loosely attached on bark or rock, coriaceous, 4–9 cm in diameter; lobes sublinear-elongate, 0.8–2.5 mm wide; bulbate cilia conspicuous, up to 2.5 mm long; upper surface plane to convex, maculate, cracked on older lobes; lower surface brown to blackish brown, moderately rhizinate, the rhizines pale brown, coarse, mostly simple (Figure 8b). Apothecia very common (frequency 100%), adnate, 1–6 mm in diameter, ecoronate, basally retrorsely rhizinate; spores 8, 4–6 × 7–10 μm.

CHEMISTRY.—Medulla K+ yellow, C−, KC−, P+ pale orange, norstictic, stictic, and usnic acids with or without atranorin.

HABITAT.—On rocks (granite, sandstone), rarely on trees, in open forests at low elevation.

DISTRIBUTION.—Australia and Tasmania.