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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 but well-drained sand, gravel or exposed bedrock along roadsides or in disturbed areas or in lichen woodlands with black spruce | ||||||||||||||||||||||||||||||||
| Associated Species: | boreal yarrow, fireweed, Holboell rockcress | ||||||||||||||||||||||||||||||||
| 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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| Narrowleaf arnica 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 or woody base | ||||||||||||||||||||||||||||||||
| Stems: | branched, more or less densely long-hairy, without conspicuous tuft of brown wool in basal leaf axils | ||||||||||||||||||||||||||||||||
| Leaves: | basal and on the stem; basal leaves several, 6 – 9 cm long, inversely lance-shaped, base tapering to winged petiole, conspicuously 3 – 5-nerved, nerves may appear reddish and extend from tip to base, long-hairy, margin obscurely toothed; stem leaves opposite, sessile, 2 – 6, to 5 cm long, lance-shaped, apex tapered, conspicuously 3-nerved, more or less long-hairy, margins entire to obscurely toothed | ||||||||||||||||||||||||||||||||
| Inflorescence: | terminal and axillary, solitary to few, erect, heads to 5 cm across; stalk and base of involucre glandular; bracts 10 – 15 in two equal or subequal series, 10 – 15 mm high; outer row lance-shaped, purple-tipped; inner row linear, green with dry and membranous margins | ||||||||||||||||||||||||||||||||
| Flowers: | ray and disc florets; ray florets 5 – 15, yellow, petal notched at tip, pistillate; disc florets many, to 8.5 mm long, perfect; anthers yellow; style branches flattened | ||||||||||||||||||||||||||||||||
| Fruits: | achene short-hairy, to 6 mm long, slender, 5 – 10-nerved; pappus white, barbed, capillary bristles | ||||||||||||||||||||||||||||||||
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