Bryologist 76, 1: 213 (1973).
Synonym: Index Fungorum
Type: Holotype: MEXICO, BAJA CALIFORNIA: Desierto Viscaino region, Las Trinajas and vicinity in cerros east of Los Pichachos de Santa Clara, sandy desert with rocky slopes, with succulent trees and low dispersed shrubs, 200 - 800 feet elevation, 21 - 23 March 1947, H. S. Gentry 7580 (US) from the Allan Hancock Foundation Expedition.
Protolog: Data lacking.
Type locality: Data lacking.
Barcode: Data lacking.
Coordinates: Data lacking.
Thallus: Tufted, up to 8.5 cm in length. Branches fine, usually ca. 0.5 mm wide, abundantly branching in a perpendicular manner from the central axis, becoming dense and intertangled. Branches ellipsoidal in cross-section, becoming flattened, especially basally; solid. Finer branches and terminal segments displaying a lumpy, extruded appearance, with the branch tips recurvent and nodular. Cortex smooth and shiny, frequently thinning to form extensive longitudinal striations exposing the white medulla and producing a base for the formation of conspicuous corticate granules (ca. 100 µm), leaving pits in the striae upon evacuation. Thallus stramineous. Apothecia usually present, subterminal, concave; underside of the thalline margin crinkled; disk buff and dull (maximum width 2 mm). Spores straight, uniseptate, 8.8 X 4.4 µm.
Algae:
Chemistry: All color reactions are negative. Usnic acid and two unknown acids present.
Ecology:
Molecular data: Genbank
Distribution: Known from the type collection, a second collection from the same site and date and from Sinaloa. Database
Note: