Thallus: fruticose, yellow-green, 5-10 cm high.
Apothecia: common, to 1 mm diam., with black disc and prominant verrucose margin
Ascospores: hyaline, simple, 9-11 x 6-8 Ám.

Ecology and distribution. Common and widespread in the southern subpolar region and Antarctica, but absent from Australia and New Zealand.

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South Georgia

Falkland Islands