Artemisia borealis |
Artemisia nesiotica |
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boreal wormwood, field sagewort |
island sagebrush |
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Habit | Perennials, (6–)8–20(–40) cm (cespitose), mildly aromatic; taprooted, caudices branched. | Subshrubs, 10–60 cm (rounded), aromatic. | ||||
Stems | (1–)2–5, gray-green, tomentose. |
relatively numerous, ascending or prostrate, gray, simple or branched (slender, wandlike, soft, bases woody and brittle), densely canescent. |
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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. |
cauline, gray-green; blades linear-oblong, 3–5 × 1–2 cm, mostly 3-lobed (lobes 1–2 mm wide), faces gray-hairy. |
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Involucres | hemispheric, 3–4 × 3.5–4 mm. |
broadly campanulate, 2.5 × 4–4.5 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 0; bisexual 20–50; corollas pale yellow, 1.2–1.5 mm, glandular. |
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Phyllaries | (obscurely scarious) densely tomentose-villous. |
broadly ovate, densely hairy. |
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Heads | (proximal sessile, distal pedunculate) in (leafy) spiciform arrays 4–9(–12) × (0.5–)1–5 cm. |
(usually erect, sometimes nodding) in (leafy) paniculiform arrays 10–25 × 3–5(–7) cm. |
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Cypselae | oblong-lanceoloid, somewhat compressed, 0.4–1 mm, faintly nerved, glabrous. |
(light brown) ellipsoid (ribbed), 0.5 mm, resinous. |
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Artemisia borealis |
Artemisia nesiotica |
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Phenology | Flowering mid–late summer. | |||||
Habitat | Rocky slopes, often fog-shrouded hillsides | |||||
Elevation | 0–100 m (0–300 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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CA
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Artemisia nesiotica is known only from the Channel Islands of California. It differs from the closely related A. californica by its shorter stature, wider leaf lobes, and larger heads. (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. 530. | ||||
Parent taxa | Asteraceae > tribe Anthemideae > Artemisia > subg. Drancunculus | Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | A. campestris subsp. borealis | Crossostephium insulare, A. californica var. insularis | ||||
Name authority | Pallas: Reise Russ. Reich. 3: 755. (1776) | P. H. Raven: Aliso 5: 341. (1963) | ||||
Web links |