This genus comprises a variety of rhizomatous, perennial ferns commonly referred to as bladderferns or fragile ferns. Species within this group exhibit considerable variation in appearance, complicating identification. However, they typically feature green, pinnate leaves and rounded, inflated spore clusters (sori).

Cystopteris

Cystopteris alpina

Cystopteris bulbifera is a deciduous fern that typically reaches a height of around 30 cm. It establishes rapidly, featuring upright rhizomes and clusters of pale green fronds that can grow up to 75 cm long, characterized by their lance-shaped segments. Below the often red-tinged midribs, bulbils form, which can aid in propagation.

Cystopteris bulbifera

Cystopteris diaphana

Cystopteris dickieana is a perennial fern that reaches heights of 10 to 45 cm. Its fronds are pale green, characterized by a delicate, feathery texture, and feature small leaflets arranged closely together, each with finely serrated margins.

Cystopteris dickieana

This deciduous fern grows in clumps, reaching a height of approximately 20 cm. It features upright rhizomes and clusters of lanceolate fronds that can extend up to 45 cm in length, characterized by sharply pointed segment tips and a pale, grey-green coloration.

Cystopteris fragilis

Cystopteris fragilis 'Cristata'

Cystopteris fragilis 'Depauperatum'

Cystopteris fragilis 'Dickeana'

Cystopteris fragilis from Chile

Cystopteris fragilis subsp. pseudoregia

Cystopteris fragilis var. sempervirens

Cystopteris montana

Cystopteris moupinensis is a low-growing, deciduous fern characterized by its thin, creeping rhizome. The fronds are small and triangular, featuring a yellowish-green hue, and can reach lengths of up to 50 cm.