Artemisia borealis |
Artemisia scopulorum |
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boreal wormwood, field sagewort |
alpine sagebrush, dwarf sagebrush |
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Habit | Perennials, (6–)8–20(–40) cm (cespitose), mildly aromatic; taprooted, caudices branched. | Perennials, 10–25 cm (cespitose), mildly aromatic (caudices relatively slender). | ||||
Stems | (1–)2–5, gray-green, tomentose. |
gray-green, glabrate. |
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Leaves | persistent, basal rosettes persistent, gray-green to white; blades ovate, 2–4 × 0.5–1 cm, 2–3-pinnately or -ternately lobed, lobes linear to narrowly oblong, apices acute, faces moderately to densely sericeous. |
persistent, gray-green; blades (basal) oblanceolate, 2–7 × 0.1 cm, 2-pinnately lobed (lobes linear or oblanceolate; cauline blades smaller, 1–2-pinnate or entire), faces silky-canescent. |
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Involucres | hemispheric, 3–4 × 3.5–4 mm. |
broadly globose or subglobose, 4 × 4–7 mm. |
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Florets | pistillate 8–10; functionally staminate 15–30; corollas (or lobes) yellow-orange or deep red, 2.2–3.5. |
pistillate 6–13; bisexual 15–30; corollas 1.5–2.5 mm, hairy (at least on lobes). |
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Phyllaries | (obscurely scarious) densely tomentose-villous. |
green (margins black or dark brown), densely villous. |
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Heads | (proximal sessile, distal pedunculate) in (leafy) spiciform arrays 4–9(–12) × (0.5–)1–5 cm. |
(5–22) in spiciform arrays 5–9 × 1–1.5 cm. |
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Cypselae | oblong-lanceoloid, somewhat compressed, 0.4–1 mm, faintly nerved, glabrous. |
0.8–1 mm, glabrous. |
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2n | = 18. |
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Artemisia borealis |
Artemisia scopulorum |
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Phenology | Flowering mid–late summer. | |||||
Habitat | Alpine meadows, protected areas, bases of rocks | |||||
Elevation | 3100–4200 m (10200–13800 ft) | |||||
Distribution |
AK; CA; CO; ID; MT; UT; WA; WY; AB; BC; NT; NU; SK; YT; especially at high elevations and northern latitudes; Eurasia
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CO; MT; NM; NV; UT; WY
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 19, p. 505. | FNA vol. 19, p. 520. | ||||
Parent taxa | Asteraceae > tribe Anthemideae > Artemisia > subg. Drancunculus | Asteraceae > tribe Anthemideae > Artemisia > subg. Absinthium | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | A. campestris subsp. borealis | |||||
Name authority | Pallas: Reise Russ. Reich. 3: 755. (1776) | A. Gray: Proc. Acad. Nat. Sci. Philadelphia 15: 66. (1863) | ||||
Web links |