humid zone, formerly with scrub or forest, disturbed by former grazing therefore shrubs and trees missing; artificial pampa with Solanum americanum, Portulaca oleraceum, Senna occidentalis, Borreria laevis, and grasses, basalt boulders and outcrops
on wood
F. Bungartz: thallus ± thin (distinctly broader than R. sorediosa), ±flattened and at least in parts distinctly canaliculate, medulla K+ red
standing dead tree, W-exposed; sunny, wind- and rain-exposed