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| Arnica angustifolia ssp. angustifolia Vahl | Species Image Gallery (opens in a new window) |
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| TAXONOMY | |||||||||||||||||||||||||||||||||
| Family: | Asteraceae or Compositae | ||||||||||||||||||||||||||||||||
| Genus: | Arnica | ||||||||||||||||||||||||||||||||
| Species Synonyms: | Arnica alpina ssp. angustifolia
(Vahl) Maguire Arnica alpina var. angustifolia (Vahl) Fern. Arnica alpina var. attenuata (Greene) Ediger & Barkl. Arnica alpina ssp. attenuata (Greene) Maguire Arnica alpina var. linearis Hulten Arnica alpina var. plantaginea (Pursh) Ediger & Barkl. Arnica alpina ssp. sornborgeri (Fern.) Maguire Arnica alpina var. ungavensis Boivin Arnica alpina var. vestita Hulten Arnica angustifolia ssp. attenuata (Greene) G.W. Douglas Arnica plantaginea Pursh Arnica sornborgeri Fern. Arnica terrae-novae Fern. |
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| Common Names: | narrowleaf arnica | ||||||||||||||||||||||||||||||||
| DISTRIBUTION | |||||||||||||||||||||||||||||||||
| Canada: | Yukon, Northwest Territories, northern British Columbia, northern Saskatchewan – northern Ontario – Labrador | ||||||||||||||||||||||||||||||||
| Saskatchewan: | northern Saskatchewan; Lake Athabasca – Hasbala Lake | ||||||||||||||||||||||||||||||||
| Ecoregion: | Selwyn Lake Upland, Tazin Lake Upland | ||||||||||||||||||||||||||||||||
| HABITAT | |||||||||||||||||||||||||||||||||
| Saskatchewan: | moist, well-drained sand, gravel or exposed bedrock along roadsides or in disturbed areas or in lichen woodlands with Picea mariana | ||||||||||||||||||||||||||||||||
| Associated Species: | Achillea millefolium var. borealis, Arabis holboellii, Chamerion angustifolium ssp. angustifolium | ||||||||||||||||||||||||||||||||
| RARITY STATUS | |||||||||||||||||||||||||||||||||
| Provincial
Status According to Harms (2003): |
Endangered |
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| Nature Conservancy Status: | G5 S1 |
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| Saskatchewan
Species at Risk Status: |
None |
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| COSEWIC Status: | None |
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| Arnica angustifolia is endangered because of rarity in Saskatchewan. There are only four to eight known localities of this plant in the province. No immediate threats are known but are possible in the future. | |||||||||||||||||||||||||||||||||
| SPECIES DESCRIPTION | |||||||||||||||||||||||||||||||||
| Height: | 15 – 25 cm tall | ||||||||||||||||||||||||||||||||
| Roots: | rhizomes with overlapping scales and leaf bases | ||||||||||||||||||||||||||||||||
| Stems: | branched, more or less densely long villous-tomentose, without conspicuous tuft of brown wool in basal leaf axil | ||||||||||||||||||||||||||||||||
| Leaves: | basal and cauline; basal leaves several, 6 – 9 cm long, oblanceolate, base tapering to winged petiole, conspicuously 3 – 5-nerved, nerves may appear reddish and extend from tip to base, long villous-tomentose, margin obscurely dentate; cauline leaves opposite, sessile, 2 – 6, to 5 cm long, lanceolate, apex acute to acuminate, conspicuously 3-nerved, more or less long villous-tomentose, margin entire to obscurely denticulate | ||||||||||||||||||||||||||||||||
| Inflorescence: | terminal and axillary, solitary to few, erect, radiate, heads to 5 cm across; peduncle and base of involucre with long-stipitate glands; phyllaries 10 – 15 in two equal or subequal series, 10 – 15 mm high; outer row lanceolate, purple-tipped; inner row linear, green with scarious margins | ||||||||||||||||||||||||||||||||
| Flowers: | ligulate and tubular florets; ray florets 5 – 15, yellow, ligule notched at tip, pistillate; tubular florets many, to 8.5 mm long, perfect; anthers yellow; style branches flattened | ||||||||||||||||||||||||||||||||
| Fruits: | achene to 6 mm long, short-hairy, slender, 5 – 10-nerved; pappus white, barbed, capillary bristles | ||||||||||||||||||||||||||||||||
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