Description of the genus
Rhizome short suberect to long-creeping; rhizome scales entire, membranous. Fronds tufted or spaced. Stipe grooved. Lamina rather thin to thinly coriaceous, 1–3-pinnate and pinnatifid; rachis glabrous or scaly, grooved; veins free. Sori round, at first covered by ovate to oblong, lanceolate or cup-shaped inflated bladder-like indusia attached below the sori.
Derivation of name: kustos: bladder, pteris: fern; referring to the bladder-like base of the indusia
Worldwide: c. 12 species, temperate and tropical alpine distribution
We have 4 taxa in the database for Cystopteris.