Athyrium filix-femina (L.) Roth var. angustum
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Family: Dryopteridaceae
Genus: Athyrium
Species Synonyms: Athyrium angustum (Willd.) K. Presl
Athyrium angustum var. rubellum (Gilbert) Butters
Athyrium angustum var. subtripinnatum Butters
Athyrium filix-femina var. michauxii (Spreng.) Farw.
Athyrium filix-femina var. rubellum Gilbert
Athyrium filix-femina var. angustum (Willd.) Lawson
Common Names: lady fern
subarctic lady fern
Canada: Saskatchewan – Manitoba – Ontario – Quebec – New Brunswick – Nova Scotia – Newfoundland – P.E.I
Saskatchewan: eastern-central Saskatchewan
Ecoregion: Mid-Boreal Lowland
Saskatchewan: moist woods, often along streams
Associated species: aspen species, black spruce, paper birch, resin birch, speckled alder, white spruce, woodland horsetail
Provincial Status According
to Harms (2003):
Nature Conservancy Status: G5T5 S3
Saskatchewan Species at
Risk Status:
COSEWIC Status: None
Lady fern is vulnerable in Saskatchewan because it is limited to the east-central part of the province. It is usually locally numerous but within limited localized areas.
Roots: rhizome short-creeping, densely scaly
Leaves: clustered
Stalks: 15 – 50 cm long, straw-coloured towards tip; base dark reddish-brown or black, swollen, with two rows of teeth; vascular bundles 2, with a single, U-shaped bundle upwards; scales 7 – 20 mm long, 1 – 5 mm wide, linear to oval, dark brown
Blades: 30 – 75 cm long, 1 – 1.5 x length of stalk, 10 – 35 cm wide, elliptic, lance-shaped or spoon-shaped, bipinnate or bipinnately-lobed, narrowed to base, tip tapered to a long point, herbaceous, mostly thin and delicate, veins pinnate; central axes of blade, pinna and pinnules hairless or with pale glands
Pinnae: sessile to short-stalked, linear to lance-shaped, tip tapered to a long point
Pinnules: ± lobed, segments oblong to narrowly triangular; base unequally wedge-shaped, winged on main axis of pinnule or sessile, apex obtuse to long-tapered, margin saw-toothed
Indusia: attached along one side, square-toothed or hairy on the margin, not glandular
Sori: straight or U-shaped, spore sac stalks bearing glandular hairs
Spores: yellow
1 Leaf stalk scales less than or equal to 1 cm; blades 1 – 1.5 x as long as stalk; indusial   margins mostly hairy
A. filix-femina var. angustum
1 Leaf stalk scales greater than 1 cm; blades 2 x as long as stalk; indusial margins mostly   entire
A. filix-femina var. cyclosorum