Pannaria hookeri (Borrer ex Sm.) Nyl.
Lichen hookeri Borrer ex Sm. et Sowerby, Engl. Bot. 32: tab. 2283 (1811).
Thallus ± lobate almost crustose, very closely attached, in small rosettes or spreading, to 4 cm diam., verrucose-areolate centrally, of flattened, ± radiate-plicate squamules, margins ± placoid, slightly thickened, entire or variously notched or incised, prothallus thin, black, visible between squamules, rarely projecting beyond margins. Upper surface greyish or dull brown, whitish-grey-striate, with distinctly whitish-grey margins. Apothecia ± central, sessile, often crowded, to 2 mm diam., margins conspicuous, entire or coarsely crenate, disc plane or subconvex, black, rarely dark brown, slightly granular. Ascospores ovoid-ellipsoid, smooth-walled, 12-18 × 7-10 µm, epispore ± warted-granular.
S: Marlborough (Mt Tapuaenuku), Canterbury (Mt Misery, Cass, Godley Valley), Otago (Bedford Valley, Mt Earnslaw, Lake Harris Saddle). St: (Mt Anglem). On schist rocks in alpine areas east of the Main Divide.
Bipolar
A detailed discussion of the species is given in Jørgensen loc. cit..
