Fragile Fern (Cystopteris protrusa)

Overview

Fragile Fern (Cystopteris protrusa) is a North American woodland fern with delicate, early-emerging fronds that are easily damaged. It is one of the first ferns to appear in spring.

Taxonomy

Description

Fronds are 20–40 cm long, bipinnate, with thin, translucent pinnae. The stipe is brittle. Sori are round, covered by a hood-like indusium. The rhizome protrudes (hence the name) from the soil.

Habitat and Cultivation

Found in rich, moist woods and ravines. In gardens, prefers humus-rich, well-drained soil in shade. Goes dormant in summer heat. Hardy in USDA zones 3–8.