Cystopteris Bernh.

Bladder Fern

Greek kustos - bladder, pteris - fern; refrring to the inflated bladder-like indusia.

Small terrestrial ferns. Rhizomes short-creeping, branched, scaly. Sterile and fertile fronds similar. Fronds in clusters, divided 2-3 times, shed in winter. Sori round, in groups. Indusia round, generally pouched or bladder-like.

c. 10 species, widespread in temperate regions (1 in Australia).

Spores or division.

Fronds dying down in winter, mostly less than 20 cm long but C. fragilis sometimes more; sori round and, at first, protected by ovate indusia that curl over them.

Blasdell (1963), Brownsey et al. (1985).

Source: Spencer, R. (1995). Athyriaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 1, Ferns, conifers & their allies. The identification of garden and cultivated plants. University of New South Wales Press.

Hero image
kingdom Plantae
phylum   Tracheophyta
class    Polypodiopsida
order     Polypodiales
family      Woodsiaceae
Higher taxa
Subordinate taxa
species        Cystopteris fragilis (L.) Bernh.