Ontario Ferns website

Mackay's Fragile Fern
Cystopteris tenuis

Other common names: Mackay's Bladder Fern, Mackay's Brittle Fern

Other scientific names: Nephrodium tenue

French names: Cystoptère grêle

Family: Wood Fern Family (Dryopteridaceae)

Native/Non-native: Native

Photographs: 27 photographs available, of which 7 are featured on this page. SCROLL DOWN FOR PHOTOGRAPHS.

Mackay's Fragile Fern (Cystopteris tenuis)

A Mackay's Fragile Fern frond.

Mackay's Fragile Fern (Cystopteris tenuis)

These are fairly small ferns.

Mackay's Fragile Fern (Cystopteris tenuis)

Nice clump of Mackay's Fragile Fern on a mossy rock face.

Mackay's Fragile Fern (Cystopteris tenuis)

Underside of the frond, showing sori.

Mackay's Fragile Fern (Cystopteris tenuis)

Underside.

Mackay's Fragile Fern (Cystopteris tenuis)

Base of the frond stalk.

Mackay's Fragile Fern (Cystopteris tenuis)

Another nice patch on a mossy rock face in the deep woods.