Artemisia douglasiana |
Artemisia campestris |
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California mugwort, Douglas' mugwort, Douglas' sagewort, Douglas' wormwood, mugwort, northwest mugwort |
beach wormwood, field sagewort, field wormwood, northern wormwood, Pacific sagewort, sand wormwood |
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Habit | Perennials, 50–180(–250) cm, aromatic (rhizomatous). | Biennials or perennials, (10–)30–80(–150) cm, faintly aromatic; taprooted, caudices branched. | ||||||||
Stems | 1–20, erect, brown to gray-green, simple, hairy or glabrescent. |
usually 1–5, turning reddish brown, (often ribbed) tomentose or glabrous. |
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Leaves | cauline, bicolor (white and green to light gray-green); blades narrowly elliptic to widely oblanceolate, (1–)3–11(–15) × 0.5–2(–6) cm (proximal with 3–5 lateral lobes, distal mostly entire), faces sparsely tomentose (abaxial) to sparsely hairy (adaxial). |
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. |
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Involucres | narrowly turbinate to campanulate, 2–3 × 2–4 mm. |
broadly turbinate, 2.5–3(–5) × 2–3.5(–7) mm. |
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Florets | pistillate 6–10; bisexual 6–25; corollas pale yellow, 1–1.5 mm, glabrous, sometimes glandular. |
pistillate 5–20; functionally staminate 12–30; corollas pale yellow, sparsely hairy or glabrous. |
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Phyllaries | (green to gray) ovate, tomentose to pubescent. |
(margins scarious) glabrous or villous-tomentose. |
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Heads | (usually nodding) in (leafy) paniculiform arrays 10–30 × 3–9 cm (branches widely spreading, ascending, stout). |
(pedunculate) in (mostly leafless) paniculiform arrays. |
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Cypselae | ellipsoid, 0.5–1 mm, glabrous. |
oblong-lanceoloid, somewhat compressed, 0.8–1 mm, faintly nerved, glabrous. |
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2n | = 54. |
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Artemisia douglasiana |
Artemisia campestris |
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Phenology | Flowering mid spring–late fall. | |||||||||
Habitat | Meadows, shaded sites, along drainages | |||||||||
Elevation | 100–2200 m (300–7200 ft) | |||||||||
Distribution |
CA; NV; OR; WA
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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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Discussion | Artemisia douglasiana is sometimes weedy. Reports from areas outside the northwestern portion of the United States are based on misidentifications of plants in the A. ludoviciana complex. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
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Key |
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Source | FNA vol. 19, p. 524. | FNA vol. 19, p. 506. | ||||||||
Parent taxa | Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia | Asteraceae > tribe Anthemideae > Artemisia > subg. Drancunculus | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | A. campestris var. douglasiana, A. caudata var. douglasiana, A. commutata var. douglasiana, A. desertorum var. douglasiana, A. heterophylla, A. ludoviciana var. douglasiana, A. vulgaris var. douglasiana | |||||||||
Name authority | Besser: in W. J. Hooker, Fl. Bor.-Amer. 1: 323. (1833) | Linnaeus: Sp. Pl. 2: 846. (1753) | ||||||||
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