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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
from FNA
AK; CA; CO; ID; MT; UT; WA; WY; AB; BC; NT; NU; SK; YT; especially at high elevations and northern latitudes; Eurasia
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; YT; Asia
[BONAP county map]
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
1. Herbage villoso-tomentose, glabrate, or glabrous; corollas (at least lobes) usually yellow-orange, 2.2–3 mm; mountains, w North America
subsp. borealis
1. Herbage white-hoary; corollas (at least lobes) deep red, 3–3.5 mm; w arctic North America
subsp. richardsoniana
1. Corollas reddish black; cypselae ca. 2.5 mm, margins with relatively narrow ribs
subsp. globularia
1. Corollas yellow; cypselae 1.5–2 mm, margins with relatively broad ribs
subsp. lutea
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
A. abrotanum, A. absinthium, A. alaskana, A. aleutica, A. annua, A. arbuscula, A. biennis, A. bigelovii, A. californica, A. campestris, A. cana, A. carruthii, A. douglasiana, A. dracunculus, A. filifolia, A. franserioides, A. frigida, A. furcata, A. globularia, A. glomerata, A. laciniata, A. longifolia, A. ludoviciana, A. michauxiana, A. nesiotica, A. norvegica, A. nova, A. packardiae, A. palmeri, A. papposa, A. pattersonii, A. pedatifida, A. pontica, A. porteri, A. pycnocephala, A. pygmaea, A. rigida, A. rothrockii, A. rupestris, A. scopulorum, A. senjavinensis, A. serrata, A. spiciformis, A. stelleriana, A. suksdorfii, A. tilesii, A. tridentata, A. tripartita, A. vulgaris
A. abrotanum, A. absinthium, A. alaskana, A. aleutica, A. annua, A. arbuscula, A. biennis, A. bigelovii, A. borealis, A. californica, A. campestris, A. cana, A. carruthii, A. douglasiana, A. dracunculus, A. filifolia, A. franserioides, A. frigida, A. furcata, A. glomerata, A. laciniata, A. longifolia, A. ludoviciana, A. michauxiana, A. nesiotica, A. norvegica, A. nova, A. packardiae, A. palmeri, A. papposa, A. pattersonii, A. pedatifida, A. pontica, A. porteri, A. pycnocephala, A. pygmaea, A. rigida, A. rothrockii, A. rupestris, A. scopulorum, A. senjavinensis, A. serrata, A. spiciformis, A. stelleriana, A. suksdorfii, A. tilesii, A. tridentata, A. tripartita, A. vulgaris
Subordinate taxa
A. borealis subsp. borealis, A. borealis subsp. richardsoniana
A. globularia subsp. globularia, A. globularia subsp. lutea
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)
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