Artemisia globularia |
Artemisia nesiotica |
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purple wormwood |
island sagebrush |
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Habit | Perennials, (3–)5–16(–30) cm (cespitose), faintly aromatic (not rhizomatous, taproots stout, caudices simple or branched, proximal branches clothed with persistent leaf bases). | Subshrubs, 10–60 cm (rounded), aromatic. | ||||
Stems | 1–5, erect, whitish gray, densely tomentose. |
relatively numerous, ascending or prostrate, gray, simple or branched (slender, wandlike, soft, bases woody and brittle), densely canescent. |
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Leaves | mostly basal (cauline 1–4), greenish to whitish green; blades (basal) 1–4.5 × 0.6–1.5 cm, 1–2-ternately to palmately lobed (flowering-stem blades 3-lobed), faces sparsely hairy. |
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 | campanulate or hemispheric, 3.5–6 × 6–11 mm. |
broadly campanulate, 2.5 × 4–4.5 mm. |
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Florets | pistillate 9–10; bisexual 20–30; corollas yellow or reddish black, 2–3 mm, sometimes glandular. |
pistillate 0; bisexual 20–50; corollas pale yellow, 1.2–1.5 mm, glandular. |
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Phyllaries | lanceolate (margins brown), pilose. |
broadly ovate, densely hairy. |
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Heads | (2–20, peduncles 0 or to 25 mm) in subcapitate to capitate arrays 2–3 × 2–3 cm. |
(usually erect, sometimes nodding) in (leafy) paniculiform arrays 10–25 × 3–5(–7) cm. |
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Cypselae | oblong, 1.5–2.5 mm, (apices flattened) glabrous. |
(light brown) ellipsoid (ribbed), 0.5 mm, resinous. |
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Artemisia globularia |
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; YT; Asia |
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. 525. | FNA vol. 19, p. 530. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Ajania globularia, A. norvegica subsp. globularia | Crossostephium insulare, A. californica var. insularis | ||||
Name authority | Chamisso ex Besser: Nouv. Mém. Soc. Imp. Naturalistes Moscou 3: 64. (1833) | P. H. Raven: Aliso 5: 341. (1963) | ||||
Web links |