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| Athyrium filix-femina (L.) Roth var. angustum | Species Image Gallery (opens in a new window) |
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| TAXONOMY | |||||||||
| 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 |
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| Common Names: | lady fern subarctic lady fern |
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| DISTRIBUTION | |||||||||
| Canada: | Saskatchewan – Manitoba – Ontario – Quebec – New Brunswick – Nova Scotia – Newfoundland – P.E.I | ||||||||
| Saskatchewan: | eastern-central Saskatchewan | ||||||||
| Ecoregion: | Mid-Boreal Lowland | ||||||||
| HABITAT | |||||||||
| Saskatchewan: | moist woods, often along streams | ||||||||
| Associated Species: | Alnus incana ssp. rugosa, Betula neoalaskana, Betula papyrifera, Equisetum sylvaticum, Picea glauca, Picea mariana, Populus sp. | ||||||||
| RARITY STATUS | |||||||||
| Provincial
Status According to Harms (2003): |
Vulnerable |
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| Nature Conservancy Status: | G5T5 S3 |
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| Saskatchewan
Species at Risk Status: |
None |
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| COSEWIC Status: | None |
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| Athyrium filix-femina ssp. angustum 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. | |||||||||
| SPECIES DESCRIPTION | |||||||||
| Roots: | rhizome short-creeping, densely scaly | ||||||||
| Fronds: | clustered | ||||||||
| Stipes: | 15 – 50 cm long, straw-coloured distally, 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 ovate, dark brown | ||||||||
| Blades: | 30 – 75 cm long, 1 – 1.5 x length of stipe, 10 – 35 cm wide, elliptic, lanceolate or oblanceolate, bipinnate or bipinnate-pinnatifed, narrowed to base, apex acuminate, herbaceous, mostly thin and delicate, veins pinnate; rachis, costa and costules glabrous or with pale glands | ||||||||
| Pinnae: | sessile to short-stalked, linear to lanceolate, apex acuminate | ||||||||
| Pinnules: | ± pinnatifed, segments oblong to narrowly deltate, base unequally cuneate, decurrent on to costal wing, or sessile, apex obtuse to acuminate, margin serrate | ||||||||
| Indusia: | attached along one side, dentate or ciliate, not glandular | ||||||||
| Sori: | drupe, 3.5-4.5 mm long, red, viscid-pubescent; seed 3-3.5 mm long, yellowish, smooth | ||||||||
| Spores: | yellow | ||||||||
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