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Arnica angustifolia
Arnica angustifolia Vahl
Narrowleaf Arnica, Alpine Arnica
Asteraceae (Aster Family)
Synonym(s):
USDA Symbol: ARAN5
USDA Native Status: L48 (N), AK (N), CAN (N), GL (N)
A variable, tufted plant with a rosette of lance-shaped leaves and a single, slender stem rising 4-16 in. and bearing a large, single flower with toothed, yellow petals and yellow discs. Sometimes two smaller lateral heads occur in the axils of the uppermost leaves. Long, narrow basal leaves become reduced in size up the stem. All leaves are long-haired.
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Plant Characteristics
Duration: PerennialHabit: Herb
Root Type: Tap
Leaf Shape: Linear
Size Notes: Up to about 16 inches tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom Information
Bloom Color: YellowBloom Time: May , Jun , Jul , Aug , Sep
Distribution
USA: AK , CO , ID , MT , WYCanada: AB , BC , MB , NL , NT , NU , ON , QC , SK , YT
Native Distribution: Circumboreal, s. in high mts. to B.C. & Alt. (reported from Beaverhead Mt., MT)
Native Habitat: Bare, rocky slopes & alpine summits
Growing Conditions
Light Requirement: SunSoil Moisture: Dry
Soil Description: Dry, sandy or rocky soils.
Propagation
Description: Propagate by seed or division of rhizomes or mature plants. Seed germination is good.Seed Treatment: Germination is enhanced by stratification.
Commercially Avail: yes
Web Reference
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resources
USDA: Find Arnica angustifolia in USDA PlantsFNA: Find Arnica angustifolia in the Flora of North America (if available)
Google: Search Google for Arnica angustifolia
Metadata
Record Modified: 2023-03-02Research By: TWC Staff