Brittle Bladder Fern (Cystopteris fragilis)

Overview

Brittle Bladder Fern (Cystopteris fragilis) is a delicate, deciduous fern found on rocks and cliffs worldwide. Its name refers to the fragile fronds and the bladder-like indusium covering the sori.

Taxonomy

Description

Fronds are 10–30 cm long, bipinnate, with thin, translucent pinnae. The stipe is brittle and easily broken. Sori are round, covered by a hood-like, fragile indusium that withers early.

Habitat and Cultivation

Grows in crevices of limestone and other rocks, often in cool, moist, shaded sites. In cultivation, provide a rock garden or wall with good drainage, consistent moisture, and shade. It naturalizes well in mortar joints.