Greek onos - vessel, kleto - to close; referring to the closely rolled fertile fronds.
Rhizome long-creeping, underground; scales few, papery, entire. Sterile and fertile fronds different. Fertile fronds with segments beaded and in flower-like spikes, divided 1-2 times. Sterile fronds to 50 cm or so long; blade ovate-triangular in outline. Segments with irregular wavy edges; veins netted. Sori round. Indusium cup-like.
A genus of somewhat uncertain position but now generally included in the family Dryopteridaceae.
Propagation: Division or spores.
Literature: Lloyd (1971).
1 species from E North America and E Asia.
Created by: Val Stajsic
Updated by: Val Stajsic, May 2018