Artemisia borealis |
Artemisia furcata |
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boreal wormwood, field sagewort |
fork wormwood, three-fork mugwort, three-fork wormwood |
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Habit | Perennials, (6–)8–20(–40) cm (cespitose), mildly aromatic; taprooted, caudices branched. | Perennials, 7–35 cm (not cespitose), faintly aromatic (not rhizomatous, taproots stout, caudices simple or branched, branches clothed with persistent leaf bases). | ||||
Stems | (1–)2–5, gray-green, tomentose. |
(flowering) 1–5, erect, light brown, simple, strigillose or 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. |
basal (in rosettes) and cauline, gray-green; blades oval, 2–10(–12) cm (basal) or 1–1.5 × 0.4–0.6 cm (cauline), 1–3-palmately lobed, faces sparsely to densely strigillose. |
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Involucres | hemispheric, 3–4 × 3.5–4 mm. |
broadly campanulate, 3–6 × 4.5–8 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 6–7; bisexual 15–26; corollas mostly yellow, sometimes red-tinged, 1–2 mm, glabrous or glabrate. |
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Phyllaries | (obscurely scarious) densely tomentose-villous. |
(greenish, color often obscured by indument) ovate or lanceolate (margins dark brown), sparsely to densely tomentose. |
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Heads | (proximal sessile, distal pedunculate) in (leafy) spiciform arrays 4–9(–12) × (0.5–)1–5 cm. |
(erect or spreading, some nodding, peduncles 0 or to 30 mm) in racemiform or spiciform arrays 1–6 × 1–2 cm. |
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Cypselae | oblong-lanceoloid, somewhat compressed, 0.4–1 mm, faintly nerved, glabrous. |
oblong (ribbed), 1–1.5 mm, glabrous. |
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2n | = 18, 36, 72, 90. |
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Artemisia borealis |
Artemisia furcata |
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Phenology | Flowering late summer. | |||||
Habitat | Talus slopes or tundra | |||||
Elevation | 500–2700 m (1600–8900 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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AK; WA; AB; BC; NT; NU; YT; Asia
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Artemisia furcata extends from the islands of the Bering Sea into southern and interior Alaska, parts of Canada (disjunct in British Columbia and the northernmost Rocky Mountains of Alberta), and on Mt. Rainier in Washington. The array of names applied to A. furcata shows the taxonomic confusion arising from a myriad of morphologic variants that may indicate introgression with other species. (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. 525. | ||||
Parent taxa | Asteraceae > tribe Anthemideae > Artemisia > subg. Drancunculus | Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | A. campestris subsp. borealis | A. furcata var. heterophylla, A. hyperborea, A. tacomensis, A. trifurcata | ||||
Name authority | Pallas: Reise Russ. Reich. 3: 755. (1776) | M. Bieberstein: Fl. Taur.-Caucas. 3: 567. (1819) | ||||
Web links |