Artemisia franserioides |
Artemisia douglasiana |
|
---|---|---|
bursage mugwort, ragweed sagebrush |
California mugwort, Douglas' mugwort, Douglas' sagewort, Douglas' wormwood, mugwort, northwest mugwort |
|
Habit | Biennials or perennials, 30–100 cm, faintly aromatic (rhizomatous). | Perennials, 50–180(–250) cm, aromatic (rhizomatous). |
Stems | 1–3, erect, reddish brown, simple (leafy), glabrous or glabrate. |
1–20, erect, brown to gray-green, simple, hairy or glabrescent. |
Leaves | basal (in rosettes, petiolate) and cauline, bicolor (white and green); blades ovate, 3–7(–20) × 2–4(–6) cm, 2–3-pinnately-lobed (lobes elliptic, 2–6 mm wide; cauline sessile, smaller), faces tomentose (abaxial) or glabrous or glabrescent (adaxial), glandular. |
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). |
Involucres | broadly ovate, 3–5 × 4–5(–6) mm. |
narrowly turbinate to campanulate, 2–3 × 2–4 mm. |
Florets | pistillate 4–5(–13), (1–1.5 mm); bisexual 25–35; corollas yellow, 1.5–2 mm, glabrous. |
pistillate 6–10; bisexual 6–25; corollas pale yellow, 1–1.5 mm, glabrous, sometimes glandular. |
Phyllaries | broadly ovate, sparsely hairy. |
(green to gray) ovate, tomentose to pubescent. |
Heads | (nodding, peduncles 0 or 2) in paniculiform to racemiform arrays 10–35 × 2–4 cm (often 1-sided). |
(usually nodding) in (leafy) paniculiform arrays 10–30 × 3–9 cm (branches widely spreading, ascending, stout). |
Cypselae | elliptic, 0.5–0.8 mm, glabrous. |
ellipsoid, 0.5–1 mm, glabrous. |
2n | = 54. |
|
Artemisia franserioides |
Artemisia douglasiana |
|
Phenology | Flowering late summer–early fall. | Flowering mid spring–late fall. |
Habitat | Open coniferous forests, mid to upper montane | Meadows, shaded sites, along drainages |
Elevation | 2200–3100 m (7200–10200 ft) | 100–2200 m (300–7200 ft) |
Distribution |
AZ; CO; NM; Mexico (Chihuahua)
|
CA; NV; OR; WA
|
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.) |
|
Source | FNA vol. 19, p. 525. | FNA vol. 19, p. 524. |
Parent taxa | Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia | Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia |
Sibling 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 | Greene: Bull. Torrey Bot. Club 10: 42. (1883) | Besser: in W. J. Hooker, Fl. Bor.-Amer. 1: 323. (1833) |
Web links |
|