Artemisia campestris |
Artemisia tripartita |
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beach wormwood, field sagewort, field wormwood, northern wormwood, Pacific sagewort, sand wormwood |
cut-leaf sagebrush, three-tip sagebrush |
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Habit | Biennials or perennials, (10–)30–80(–150) cm, faintly aromatic; taprooted, caudices branched. | Shrubs, 5–15 or 20–150(–200) cm, aromatic; root-sprouting (caudices with adventitious buds, fibrous rooted). | ||||||||||||
Stems | usually 1–5, turning reddish brown, (often ribbed) tomentose or glabrous. |
pale gray, glabrous. |
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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. |
deciduous, gray-green; blades broadly cuneate, 1.5–4 × 0.5–2 cm, deeply 3-lobed (lobes 1–1.4 mm wide, acute; cauline leaves smaller, mostly 3-lobed). |
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Involucres | broadly turbinate, 2.5–3(–5) × 2–3.5(–7) mm. |
globose or turbinate, 2–4 × 1.5–3 mm. |
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Florets | pistillate 5–20; functionally staminate 12–30; corollas pale yellow, sparsely hairy or glabrous. |
3–11; corollas 2–2.5 mm, glandular (style branches included). |
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Phyllaries | (margins scarious) glabrous or villous-tomentose. |
broadly lanceolate (margins scarious, obscured by indument), canescent. |
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Heads | (pedunculate) in (mostly leafless) paniculiform arrays. |
in paniculiform or spiciform arrays (5–)8–15(–35) × (0.5–)1–5 cm. |
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Cypselae | oblong-lanceoloid, somewhat compressed, 0.8–1 mm, faintly nerved, glabrous. |
(columnar, unequally ribbed) 1.8–2.3 mm, glabrous or resinous. |
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Artemisia campestris |
Artemisia tripartita |
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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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ID; NV; OR; WA; WY; BC
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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.) |
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. 506. | FNA vol. 19, p. 518. | ||||||||||||
Parent taxa | ||||||||||||||
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Synonyms | A. trifida, A. tridentata subsp. trifida, Seriphidium tripartitum | |||||||||||||
Name authority | Linnaeus: Sp. Pl. 2: 846. (1753) | Rydberg: Mem. New York Bot. Gard. 1: 432. (1900) | ||||||||||||
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