Comprehensive Description
provided by Smithsonian Contributions to Botany
Pseudoparmelia arcana
Pseudoparmelia arcana (Kurokawa) Hale, 1974:189.
Parmelia arcana Kurokawa in Hale and Kurokawa, 1964:151 [type collection: Baba, Moçâmedes, Angola, Degelius (Degelius herbarium; isotype in US)].
DESCRIPTION.—Thallus tightly appressed on rock, ashy white, 3–7 cm in diameter; lobes sublinear, crowded and appearing subareolate toward the center, 0.3–1 mm wide; upper surface plane to convex, continuous to tangentially cracked, moderately isidiate, the isidia mostly simple, about 0.2 mm high; medulla white or in part pale yellow; lower surface brown to pale brown, sparsely rhizinate. Apothecia not seen.
CHEMISTRY.—Cortex K+ yellow, medulla K−, C−, KC−, P− ; atranorin, fatty acids, and unidentified pigments.
DISTRIBUTION.—Angola and Union of South Africa.
HABITAT.—On rocks in dry open areas at about 1000 m elevation.
- bibliographic citation
- Hale, Mason E., Jr. 1976. "A Monograph of the Lichen Genus Pseudoparmelia Lynge (Parmeliaceae)." Smithsonian Contributions to Botany. 1-62. https://doi.org/10.5479/si.0081024X.31
