Monographs Details: Olfersia
Authority: Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
Description:Genus Description - Hemiepiphytes or terrestrial; rhizome long-creeping, densely scaly; fronds holodimorphic; stipe scaly; sterile fronds once-pinnate, terminal pinna conform, pinna pairs 4-12, ascending, coriaceous, axis grooved above; veins parallel, oblique to costa, simple or usually forking at their base, free except for marginal commissural vein; fertile fronds much contracted, bipinnate, pinnules broadly adnate, sporangia in masses on both surfaces; indusium lacking; spores bilateral with thick, folded perispore.
Discussion:Type: Olfersia corcovadensis Raddi [=Olfersia cervina (Linnaeus) Kunze].
Dorcapteris Presl, Epimel. bot. 166. 1851. Type: Dorcapteris cervina (Linnaeus) Presl [=Olfersia cervina (Linnaeus) Kunze].
Olfersia is a monotypic genus, widespread in neotropics. It is closely related to, and often placed in the genus Polybotrya (q.v.), but differs from it in its conform terminal pinna, largely free, parallel venation uniting at the margin, and sporangia borne on both upper and lower surfaces of the fertile frond.