Monographs Details: Asplenium auritum Sw. var. auritum
Authority: Morton, Conrad V. & Lellinger, David B. 1966. The Polypodiaceae subfamily Asplenioideae in Venezuela. Mem. New York Bot. Gard. 15: 1-49.
Description:Species Description - Rhachis non-alate or nearly so; pinnae mostly acuminate, not pinnatifid, with a superior basal auricle, this nearly free, usually acutish.
Distribution and Ecology - Probably throughout the range of the species. In Venezuela in the states of Sucre, Anzoategui, Distrito Federal, Aragua, Merida, Bolivar, and probably elsewhere.
Guayana Highlands distribution. SURINAME. Arrowhead Basin, Tafelberg, 625m. Maguire 24479. BRITISH GUIANA. Kaietuk Gorge, one-half mile below the fall, Tutin 521. VENEZUELA. Bolivar: Mount Roraima, 1050 m, McConnell & Quelch 607 (NY), 623 (fide Posthumus); Schomburgk 1268 (B, photograph 9601) Middle forested slopes near Rio Tirica, Agparaman-tepui, Chimanta Massif. 1365 m, Steyermark & Wurdack 1251. Salta de Para, Medio Rio Caura. 300 m, Ll. Williams 11420. COLOMBIA. Meta (Sierra de la Macarena) : Cano Entrada, 500 m, Philipson & Idrobo 1760. Cano Yerli, between Rio Giiejar and Cano Guacayita, 500-600 m, Idrobo & Schultes 762.
Somewhat similar is A. auritum var. intermedium Mett., which is based on A. umbrosum Kaulf. Enum. Fil. 168. 182417 (type: Brazil, Chamisso, not seen), non A. umbrosum Vill., 1786. This variety apparently forms a transition between var. auritum and var. bipinnatifidum, being just slightly but not deeply pinnatifid, thus being more divided than var. auritum and less so than in var. bipinnatifidum. It has not been found in Venezuela, apparently, but is perhaps to be expected there.