Artemisia rupestris |
Artemisia aleutica |
|
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sagebrush |
Aleutian wormwood |
|
Habit | Perennials, 5–15(–25) cm (cespitose), faintly aromatic. | Perennials, 5–10 cm (cespitose), mildly aromatic; caudices branched. |
Stems | brownish purple, glabrous. |
usually 1, reddish brown to gray, tomentose to glabrate. |
Leaves | deciduous, bright green; blades (proximalmost petiolate) ovate, 1.5–5 × 1–2.5 cm, 2–3-pinnately lobed (cauline sessile, ternately or pinnately lobed, terminal lobes lance-linear, 1–6 × 0.5–1 mm), faces glabrous or sparsely hairy, glandular. |
persistent, mostly basal, gray-green; (petioles often expanded) blades (at least proximal) obovate, 1.5–5 × 0.5–1 cm, 2-palmately lobed, lobes relatively narrow, apices acute, faces densely white-villous (brownish in age); cauline smaller, distally 1-ternate. |
Involucres | globose, 4–5(–7) × 4–5(–7) mm. |
hemispheric or globose, (2–)5–7 × (2–)6–8 mm. |
Florets | pistillate 14–16 (glandular, style branches exsert, linear, spreading); bisexual 40–70; corollas 1.5–2 mm, glabrous or glandular (styles shorter than corollas). |
pistillate 4–6; functionally staminate 15–30; corollas purplish red, 1.5–2 mm, hairy. |
Phyllaries | green (margins light green), ± hairy. |
villous. |
Heads | (5–9, pedunculate or sessile, spreading or drooping) in spiciform arrays 3–9 × 0.5–1 cm. |
(sessile or peduncles 2–15 mm) in racemiform or spiciform arrays, 1.5–3 × 0.5–1 cm. |
Cypselae | ca. 1 mm (apices flat), glabrous. |
oblong, ca. 1 mm, faintly nerved, glabrous. |
Artemisia rupestris |
Artemisia aleutica |
|
Phenology | Flowering late summer–fall. | Flowering mid–late summer. |
Habitat | Steppes, alkaline meadows, stony slopes | Open areas, fellfield tundra |
Elevation | 0–1400 m (0–4600 ft) | 0–100 m (0–300 ft) |
Distribution |
YT; Asia |
AK |
Discussion | The sole North American occurrence of Artemisia rupestris in southwestern Yukon is a remarkable disjunction from the Asiatic range of this species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Of conservation concern. Artemisia aleutica is known only from the western Aleutian Islands. It is morphologically similar to A. borealis, and the relationships of these species complexes warrant further study. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 19, p. 520. | FNA vol. 19, p. 505. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Absinthium viridifolium var. rupestre, A. rupestris subsp. woodii | |
Name authority | Linnaeus: Sp. Pl. 2: 847. (1753) | Hultén: Bot. Not. 1939: 829, fig. 2. (1939) |
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