Pteridium aquilinum (bracken)

Leaf type: Fronds with elongated smooth or lobed leaflets
Phyllotaxis: Opposite and alternate

Leaf (upper side)

Pteridium aquilinum frond
Frond
Pteridium aquilinum leaflets
Pteridium aquilinum leaflets.

Habitus & biology

Pteridium aquilinum is a deciduous and perennial fern. The fronds can grow to over two metres high. It spreads by spores and rhizomes (runners) growing underground.

The elongated leaflets can be smooth-edged, slightly lobed or pinnately lobed.

All parts of the plant are poisonous.

Pteridium aquilinum habitus
Pteridium aquilinum habitus in late summer (September).

Bracken fern habitus

Distribution & habitates

The distribution area includes Europe as well as regions in North Asia and North Africa. As an introduced species, this fern is also said to occur in Australia (source).

The pictures for this article were taken in Brittany. The bracken fern is quite common there.

Pteridium aquilinum grows on and in forests, in meadows, on dams, on embankments, scrub edges and roadsides.

Pteridium aquilinum in meadow
Pteridium aquilinum in a meadow.
Bracken by the wayside
Bracken by the wayside.
Bracken fern on embankment
Bracken fern on embankment.

Botany

Pteridium aquilinum (common bracken, brake, pasture brake, eagle fern) is a member of the Dennstaedtiaceae family.

Pteridium aquilinum & Solanum nigrum & Hedera helix
Pteridium aquilinum & Solanum nigrum & Hedera helix