Lowland Bladder Fern — Cystopteris protrusa (Weatherby) Blasdel

Lowland Bladder Fern (Cystopteris protrusa)

Lowland Bladder Fern is fairly common on rich slopes, especially over basic rock.

Caswell Co., NC 5/30/10.

Lowland Bladder Fern (Cystopteris protrusa)

Underside detail.

Caswell Co., NC 5/30/10.

Lowland Bladder Fern (Cystopteris protrusa)

Less commonly Cystopteris grows on rock ledges.

Caswell Co., NC 5/30/10.

All photographs and text ©2025 by Will Cook unless otherwise noted.