Artemisia campestris |
Artemisia carruthii |
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beach wormwood, field sagewort, field wormwood, northern wormwood, Pacific sagewort, sand wormwood |
Carruth wormwood, Carruth's sagebrush, Carruth's sagewort, Carruth's wormwood |
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Habit | Biennials or perennials, (10–)30–80(–150) cm, faintly aromatic; taprooted, caudices branched. | Perennials, 15–40(–70) cm, faintly aromatic (rhizomatous). | ||||||||
Stems | usually 1–5, turning reddish brown, (often ribbed) tomentose or glabrous. |
mostly 3–8, ascending, brown to gray-green, simple (bases curved, somewhat woody), sparsely to densely tomentose. |
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Leaves | persistent or deciduous, mostly basal; basal blades 4–12 cm; cauline gradually reduced, 2–4 × 0.5–1.5 cm, 2–3-pinnately lobed, lobes linear to narrowly oblong, apices acute, faces densely to sparsely white-pubescent. |
cauline, bicolor (± gray-green); blades narrowly elliptic, 0.1–2.5(–3) × 0.5–1 cm (gradually smaller distally), relatively deeply pinnatifid (lobes 3–5), faces densely tomentose (abaxial) to sparsely hairy (adaxial). |
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Involucres | broadly turbinate, 2.5–3(–5) × 2–3.5(–7) mm. |
campanulate, 2–2.5(–3) × 1.5–3 mm. |
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Florets | pistillate 5–20; functionally staminate 12–30; corollas pale yellow, sparsely hairy or glabrous. |
pistillate 1–5; bisexual 7–25; corollas pale yellow, 1–2 mm, glandular-pubescent. |
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Phyllaries | (margins scarious) glabrous or villous-tomentose. |
lanceolate, gray-tomentose. |
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Heads | (pedunculate) in (mostly leafless) paniculiform arrays. |
(usually nodding) in (leafy) paniculiform arrays 10–30 × 3–9 cm (branches erect). |
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Cypselae | oblong-lanceoloid, somewhat compressed, 0.8–1 mm, faintly nerved, glabrous. |
(light brown) cylindro-elliptic, ca. 0.5 mm, (curved at summits, scarcely nerved), glabrous (shining). |
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2n | = 18. |
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Artemisia campestris |
Artemisia carruthii |
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Phenology | Flowering mid summer–early fall. | |||||||||
Habitat | Open sites, usually sandy soils, wooded areas, grasslands, railroads | |||||||||
Elevation | 600–2900 m (2000–9500 ft) | |||||||||
Distribution |
AK; AR; AZ; CA; CO; CT; FL; IA; ID; IL; IN; KS; MA; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TX; UT; VT; WA; WI; WY; AB; BC; MB; NB; NU; ON; QC; SK; especially mountains and high latitudes; Eurasia
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AZ; CO; KS; MI; MO; NM; OK; TX; UT; Mexico (Chihuahua, Sonora)
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Discussion | Subspecies ca. 7 (3 in the flora). Artemisia campestris varies; each morphologic form grades into another. The present circumscription is conservative in that only three subspecies are recognized; the subspecies usually can be separated geographically as well as morphologically. Populations in western North America consist primarily of subsp. pacifica; east of the continental divide, plants are assigned to subsp. canadensis in northern latitudes and to subsp. caudata in southern latitudes. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Artemisia carruthii is closely related to members of the A. ludoviciana complex, with which it may intergrade. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 19, p. 506. | FNA vol. 19, p. 524. | ||||||||
Parent taxa | ||||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | A. bakeri, A. coloradensis, A. kansana, A. vulgaris subsp. wrightii, A. wrightii | |||||||||
Name authority | Linnaeus: Sp. Pl. 2: 846. (1753) | Alph. Wood ex Carruth: Trans. Kansas Acad. Sci. 5: 51. (1877) | ||||||||
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