E-Flora BC: Electronic Atlas of the Flora of British Columbia

Adiantum aleuticum var. aleuticum (Rupr.) Paris
Pteridaceae (Maidenhair Fern family)

Introduction to Vascular Plants

© Kevin deBoer  Email the photographer   (Photo ID #9926)

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Distribution of Adiantum aleuticum var. aleuticum
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Species Information

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General:
Deciduous perennial, palmately branched, from a stout, scaly rhizome, 15-75 cm tall.
Leaves:
Broadly fan-shaped, 10-75 cm long; stalks reddish-brown to purplish-black; blades more or less palmately-pinnate, set at right angles to the stalks and more or less parallel to the ground, 10-40 cm long, 10-40 cm wide, rounded to kidney-shaped, forked at the bases into 2 recurved-spreading divisions which in turn bear 2-several shorter divisions, the larger divisions with 15-35, alternate, short-stalked
Notes:
Small plants with small fronds (5 to 15 cm across) and strongly overlapping ultimate segments were described as A. pedatum L. var. subpumilum Wagner. They clearly belong to this species, but no formal nomenclatural transfer has been done yet. This variety is rare on coastal bluffs from northern Vancouver Island south to the Olympic Peninsula, WA.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist forests, rocks, scree, cliffs, banks and waterfall spray zones in the lowland and montane zones; frequent throughout BC, mostly S of 55°N, infrequent in SC BC; amphiberingian, N to AK, E to SW AB and S to CO, AZ and CA; disjunct E to PQ and NF and S to PA, WV and MI; E Asia.

Source: The Illustrated Flora of British Columbia

Taxonomic and Nomenclatural Links

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General References