Artemisia absinthium |
Artemisia papposa |
|
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absinthe, absinthium, wormwood |
Owyhee sagebrush |
|
Habit | Herbs perennial, 4–12 dm; with woody caudices, fibrous-rooted. | Shrubs semi-deciduous, 1.5–3.5 dm; taprooted. |
Stems | canescent, often glabrate proximally. |
canescent or tomentose. |
Leaves | numerous; cauline, 3–8 cm, 1–3-pinnate; lobes 2–4 mm wide, toothed; surfaces finely canescent; petioles short or long. |
cauline, crowded, usually wedge-shaped, 1.5–4 cm, 3–5-lobed; lobes sometimes with secondary lobes; surfaces villous-tomentose, petiolate. |
Inflorescences | panicle-like; narrow or spreading. |
raceme-like. |
Involucres | broadly ovoid or hemispheric, 2–3 mm. |
hemispheric, 2–3.5 mm. |
Receptacles | villous. |
glabrous. |
Florets | 50+; outer pistillate; inner bisexual. |
25–45; outer pistillate; inner bisexual. |
Phyllaries | in 3–4 ± equal series, lanceolate; tips acute or obtuse; surfaces canescent. |
in 3–4 unequal series, widely spreading; ovate to elliptic or oblanceolate; outer shorter; margins membranous; surfaces tomentose. |
Fruits | 0.4–0.6 mm, glabrous. |
0.3–0.5 mm, minutely glandular. |
Heads | disciform, arched or nodding; short-peduncled. |
disciform; erect, sessile or peduncled. |
2n | =18. |
|
Artemisia absinthium |
Artemisia papposa |
|
Distribution | ||
Discussion | Coniferous woods, disturbed areas. Flowering Jun–Oct. 0–1200 m. BW, WV. ID, WA; scattered in northern North America; Europe. Exotic. |
Shrublands, meadows, moist swales, edges and dry beds of streams. Flowering Jun–Jul. 1400–2000 m. Owy. ID, NV. Native. Artemisia papposa is unique among Artemisia in having fruits with minute pappi. |
Source | Flora of Oregon, volume 2, page 189 Kenton Chambers |
Flora of Oregon, volume 2, page 193 Kenton Chambers |
Sibling taxa | ||
Web links |