Xanthoparmelia hypopsila (Müll. Arg.) Hale
Phytologia 28: 488 (1974).
Basionym: Parmelia hypopsila Müll. Arg., Flora, Regensburg 70: 317 (1887).
Synonyms: Index Fungorum
Type: Uruguay, Arechavaleta 12 (G - lectotype).
Thallus: adnate to loosely adnate on rock, less commonly on soil, rather brittle and often breaking apart when collected, 8-15 cm broad, yellowish green; lobes subirregular to sublinear, 1-2.5 mm wide, weakly convoluted at the tips, usually elongate, contiguous to crowded and imbricate, with some coarse subascending lobules; upper surface continuous, emaculate, shiny, isidia and soredia lacking; medulla white; lower surface plane, often with a weakly developed raised yellowish rim toward the tips, black, shiny, very sparsely rhizinate at the tips, sparsely rhizinate at the center, the rhizines black, simple, 0.5-1 mm long. Pycnidia common; conidia bifusiform, 0.5 x 5-6 µm. Apothecia substipitate, 2-5mm in diameter; spores 5-6 x 9-12 µm.
CHEMISTRY.-Stictic, constictic, norstictic, and usnic acids.
Photobiont: Trebouxia.
Chemistry: Stictic acid, constictic acid, norstictic acid, usnic acid.
Ecology: on rock, less commonly on soil.
Molecular data: Genbank
Distribution: Brazil, Uruguay, Chile, Paraguay, Argentina. Database
Note: