Artemisia tripartita |
Artemisia longifolia |
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cut-leaf sagebrush, three-tip sagebrush |
long-leaf sage, longleaf sagebrush, longleaf wormwood |
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Habit | Shrubs, 5–15 or 20–150(–200) cm, aromatic; root-sprouting (caudices with adventitious buds, fibrous rooted). | Perennials, 20–80 cm (not cespitose), pleasantly aromatic (fibrous-rooted, rootstocks relatively short, horizontal, layered stems sometimes sprouting). | ||||
Stems | pale gray, glabrous. |
3–20+, erect, gray-green, usually simple, sometimes branched (bases woody), densely tomentose. |
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Leaves | 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). |
cauline, bicolor (white and green); blades linear to lanceolate, 3–12 × 1 cm, margins usually entire, sometimes toothed or lobed, faces densely tomentose (abaxial) or glabrate (adaxial). |
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Involucres | globose or turbinate, 2–4 × 1.5–3 mm. |
campanulate, 4–5 × 4–5 mm. |
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Florets | 3–11; corollas 2–2.5 mm, glandular (style branches included). |
pistillate 3–10; bisexual 8–26; corollas pale yellow, 1–2 mm, sparsely glandular. |
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Phyllaries | broadly lanceolate (margins scarious, obscured by indument), canescent. |
ovate-lanceolate (margins hyaline), densely to sparsely tomentose. |
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Heads | in paniculiform or spiciform arrays (5–)8–15(–35) × (0.5–)1–5 cm. |
(peduncles 0 or to 2 mm) in mostly racemiform arrays 8–13 × 1–2 cm. |
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Cypselae | (columnar, unequally ribbed) 1.8–2.3 mm, glabrous or resinous. |
ellipsoid, 0.5–0.8 mm, glabrous. |
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2n | = 36. |
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Artemisia tripartita |
Artemisia longifolia |
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Phenology | Flowering mid summer–early fall. | |||||
Habitat | Alkaline flats, grasslands, barren areas, high plains | |||||
Elevation | 500–1800 m (1600–5900 ft) | |||||
Distribution |
ID; NV; OR; WA; WY; BC
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ID; MN; MT; ND; NE; SD; WY; AB; BC; MB; SK
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Artemisia longifolia appears to be more salt-tolerant than most species of the genus. It is closely related to A. ludoviciana. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 19, p. 518. | FNA vol. 19, p. 527. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | A. trifida, A. tridentata subsp. trifida, Seriphidium tripartitum | A. ludoviciana var. integrifolia, A. natronensis, A. vulgaris subsp. longifolia, A. vulgaris var. longifolia | ||||
Name authority | Rydberg: Mem. New York Bot. Gard. 1: 432. (1900) | Nuttall: Gen. N. Amer. Pl. 2: 142. (1818) | ||||
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