Artemisia borealis |
Artemisia globularia |
|||||||||
---|---|---|---|---|---|---|---|---|---|---|
boreal wormwood, field sagewort |
purple wormwood |
|||||||||
Habit | Perennials, (6–)8–20(–40) cm (cespitose), mildly aromatic; taprooted, caudices branched. | Perennials, (3–)5–16(–30) cm (cespitose), faintly aromatic (not rhizomatous, taproots stout, caudices simple or branched, proximal branches clothed with persistent leaf bases). | ||||||||
Stems | (1–)2–5, gray-green, tomentose. |
1–5, erect, whitish gray, densely tomentose. |
||||||||
Leaves | persistent, basal rosettes persistent, gray-green to white; blades ovate, 2–4 × 0.5–1 cm, 2–3-pinnately or -ternately lobed, lobes linear to narrowly oblong, apices acute, faces moderately to densely sericeous. |
mostly basal (cauline 1–4), greenish to whitish green; blades (basal) 1–4.5 × 0.6–1.5 cm, 1–2-ternately to palmately lobed (flowering-stem blades 3-lobed), faces sparsely hairy. |
||||||||
Involucres | hemispheric, 3–4 × 3.5–4 mm. |
campanulate or hemispheric, 3.5–6 × 6–11 mm. |
||||||||
Florets | pistillate 8–10; functionally staminate 15–30; corollas (or lobes) yellow-orange or deep red, 2.2–3.5. |
pistillate 9–10; bisexual 20–30; corollas yellow or reddish black, 2–3 mm, sometimes glandular. |
||||||||
Phyllaries | (obscurely scarious) densely tomentose-villous. |
lanceolate (margins brown), pilose. |
||||||||
Heads | (proximal sessile, distal pedunculate) in (leafy) spiciform arrays 4–9(–12) × (0.5–)1–5 cm. |
(2–20, peduncles 0 or to 25 mm) in subcapitate to capitate arrays 2–3 × 2–3 cm. |
||||||||
Cypselae | oblong-lanceoloid, somewhat compressed, 0.4–1 mm, faintly nerved, glabrous. |
oblong, 1.5–2.5 mm, (apices flattened) glabrous. |
||||||||
Artemisia borealis |
Artemisia globularia |
|||||||||
Distribution |
AK; CA; CO; ID; MT; UT; WA; WY; AB; BC; NT; NU; SK; YT; especially at high elevations and northern latitudes; Eurasia
|
AK; YT; Asia |
||||||||
Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||||||
Key |
|
|
||||||||
Source | FNA vol. 19, p. 505. | FNA vol. 19, p. 525. | ||||||||
Parent taxa | Asteraceae > tribe Anthemideae > Artemisia > subg. Drancunculus | Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | A. campestris subsp. borealis | Ajania globularia, A. norvegica subsp. globularia | ||||||||
Name authority | Pallas: Reise Russ. Reich. 3: 755. (1776) | Chamisso ex Besser: Nouv. Mém. Soc. Imp. Naturalistes Moscou 3: 64. (1833) | ||||||||
Web links |