Canoparmelia concrescens (Vain.) Elix & Hale

Pseudoparmelia concrescens

Pseudoparmelia concrescens (Vainio) Hale

Parmelia concrescens Vainio, 1901:400 [type collection: Serra da Xella, Huila, Angola, Welwitsch 30 pro parte (TUR, lectotype; BM, isolectotype)].

Parmelia capensis Nylander, 1885:613 [type collection: Cape of Good Hope, Union of South Africa, Drège (H, Nylander herbarium number 35174, lectotype; PC, isotype); not P. capensis (Acharius) Sprengel, 1827:280 (=Teloschistes)].

Parmelia austroafricana Zahlbruckner, 1929:152 [type: based on P. capensis Nylander].

Parmelia caffrorum Zahlbruckner, 1932a:555 [type: based on P. capensis Nylander].

DESCRIPTION.—Thallus adnate on bark, ashy mineral gray, 4–10 cm in diameter; lobes irregularly sublinear, 1–3 mm wide; upper surface plane, continuous or cracked on older lobes, densely isidiate, the isidia short, cylindrical, mostly simple; lower surface black, sparsely rhizinate. Apothecia rare, adnate, 2–3 mm in diameter; spores 8, 5 × 7–8 μm.

CHEMISTRY.—Cortex K+ yellow, medulla K−, C−, KC+ faint wine red, P−; atranorin and divaricatic acid with associated unknowns.

DISTRIBUTION.—Southern Africa.

HABITAT.—On trees or rocks in open woodland at 1000–2300 m elevation.