Artemisia packardiae |
Artemisia senjavinensis |
|
---|---|---|
Packard's artemisia, Packard's wormwood, Succor Creek mugwort |
arctic wormwood |
|
Habit | Perennials, 20–50(–60) cm, strongly aromatic (rhizomatous, fibrous-rooted). | Perennials, 30–90 cm (densely cespitose), mildly aromatic (caudices branched, woody, taprooted). |
Stems | 3–20, erect, light brown, simple or branched, glabrous. |
1–9, erect, gray-green, lanate. |
Leaves | cauline, dark green; blades lanceolate, 1.5–5 × 1–2.5 cm, 2-pinnatifid (primary lobes 5–9, 0.4–1.5 cm; cauline smaller, pinnatifid to entire), faces tomentose (abaxial) or glabrous (adaxial). |
mostly basal (in rosettes, cauline 2–5, scattered on flowering stems); blades (basal) broadly oblanceolate, 0.5–0.8 × 0.5–0.7 cm, relatively deeply lobed (lobes 3–5, acute; cauline blades 0.5–1 cm, entire or pinnately lobed, lobes 3–5), faces densely tomentose to sericeous (hairs 1–2 mm). |
Involucres | campanulate to hemispheric, 2.5–3.5 × 2–4.5 mm. |
turbinate, 3–4 × 3–5 mm. |
Florets | pistillate 3–8; bisexual, sometimes functionally staminate, (15–)20–35; corollas bright yellow, 1.3–2.2 mm, glandular. |
pistillate 4–5; bisexual 3–4; corollas yellow or tan, 1.5–2, glandular (style branches blunt, not fringed). |
Phyllaries | broadly ovate, glandular (at least at bases). |
lanceolate or ovate, hairy. |
Heads | (peduncles 0 or to 3 mm) in usually paniculiform, sometimes racemiform, arrays 5–20 × 1.5–4 cm. |
in corymbiform arrays 0.5–2.5 × 0.5–2.5 cm (subtended by white-sericeous bracts). |
Cypselae | (light brown) ellipsoid (± arcuate, ribs 4, prominent), ca. 1 mm, glandular. |
(brown) linear-oblong, ca. 2 mm, (apices flat), glabrous. |
2n | = 18. |
= 36, 54. |
Artemisia packardiae |
Artemisia senjavinensis |
|
Phenology | Flowering late summer. | Flowering mid–late summer. |
Habitat | Coarse taluses, alkaline soils, erosion gullies | Open calcareous gravelly slopes in tundra or heath, sandy slopes above high tide |
Elevation | 1000–2400 m (3300–7900 ft) | 0–600 m (0–2000 ft) |
Distribution |
ID; NV; OR |
AK; e Asia (Russian Far East, Chukotka) |
Discussion | Artemisia packardiae is known only from southeastern Oregon, western Idaho, and northeastern Nevada. It is closely related to A. michauxiana and could be considered an ecologic variant. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Artemisia senjavinensis is known only from western Alaska (Seward Peninsula) and the Chukchi Peninsula of the Russian Far East. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 19, p. 531. | FNA vol. 19, p. 532. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Ajania senjavinensis, A. androsacea | |
Name authority | J. W. Grimes & Ertter: Brittonia 31: 454, fig. 1. (1979) | Besser: Nouv. Mém. Soc. Imp. Naturalistes Moscou 3: 35. (1834) |
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