Artemisia campestris |
Artemisia pycnocephala |
|||||||||
---|---|---|---|---|---|---|---|---|---|---|
beach wormwood, field sagewort, field wormwood, northern wormwood, Pacific sagewort, sand wormwood |
beach sagewort, beach wormwood, coastal sagewort, sandhill sage |
|||||||||
Habit | Biennials or perennials, (10–)30–80(–150) cm, faintly aromatic; taprooted, caudices branched. | Perennials, 30–70(–100) cm, faintly aromatic. | ||||||||
Stems | usually 1–5, turning reddish brown, (often ribbed) tomentose or glabrous. |
usually 10+ (rising beyond basal leaves, decumbent), whitish gray, (ca. 5 mm diam., densely leafy) densely hairy. |
||||||||
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. |
persistent, gray-green; blades broadly lanceolate, faces woolly-hairy; proximalmost blades 3–8 × 2–6 cm, 2–3-pinnatifid, lobes linear (to 2 mm wide); cauline somewhat reduced, 2–3 × 0.8–1.2 cm; apices acute, faces hairy. |
||||||||
Involucres | broadly turbinate, 2.5–3(–5) × 2–3.5(–7) mm. |
globose, 3–4.5 × 3–4.5 mm. |
||||||||
Florets | pistillate 5–20; functionally staminate 12–30; corollas pale yellow, sparsely hairy or glabrous. |
pistillate 5–20; functionally staminate 12–25; corollas pale yellow (broadly tubular), ca. 2 mm, glabrous. |
||||||||
Phyllaries | (margins scarious) glabrous or villous-tomentose. |
lanceolate, margins obscured by indument, hairs straight. |
||||||||
Heads | (pedunculate) in (mostly leafless) paniculiform arrays. |
(sessile, clustered in glomerules) in (densely leafy) paniculiform to spiciform arrays 10–20(–30) × 1–4 cm. |
||||||||
Cypselae | oblong-lanceoloid, somewhat compressed, 0.8–1 mm, faintly nerved, glabrous. |
ellipsoid (faintly nerved), 1–1.5 mm, glabrous. |
||||||||
Artemisia campestris |
Artemisia pycnocephala |
|||||||||
Phenology | Flowering late spring–mid summer. | |||||||||
Habitat | Rocky or sandy soils of coastal beaches | |||||||||
Elevation | 0–200 m (0–700 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
|
CA
|
||||||||
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.) |
|||||||||
Key |
|
|||||||||
Source | FNA vol. 19, p. 506. | FNA vol. 19, p. 509. | ||||||||
Parent taxa | ||||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Oligosporus pycnocephalus, A. campestris subsp. pycnocephala | |||||||||
Name authority | Linnaeus: Sp. Pl. 2: 846. (1753) | (Lessing) de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 6: 99. (1838) | ||||||||
Web links |
|