The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

boreal wormwood, field sagewort

arctic wormwood

Habit Perennials, (6–)8–20(–40) cm (cespitose), mildly aromatic; taprooted, caudices branched. Perennials, 30–90 cm (densely cespitose), mildly aromatic (caudices branched, woody, taprooted).
Stems

(1–)2–5, gray-green, tomentose.

1–9, erect, gray-green, lanate.

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 (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

hemispheric, 3–4 × 3.5–4 mm.

turbinate, 3–4 × 3–5 mm.

Florets

pistillate 8–10; functionally staminate 15–30;

corollas (or lobes) yellow-orange or deep red, 2.2–3.5.

pistillate 4–5;

bisexual 3–4;

corollas yellow or tan, 1.5–2, glandular (style branches blunt, not fringed).

Phyllaries

(obscurely scarious) densely tomentose-villous.

lanceolate or ovate, hairy.

Heads

(proximal sessile, distal pedunculate) in (leafy) spiciform arrays 4–9(–12) × (0.5–)1–5 cm.

in corymbiform arrays 0.5–2.5 × 0.5–2.5 cm (subtended by white-sericeous bracts).

Cypselae

oblong-lanceoloid, somewhat compressed, 0.4–1 mm, faintly nerved, glabrous.

(brown) linear-oblong, ca. 2 mm, (apices flat), glabrous.

2n

= 36, 54.

Artemisia borealis

Artemisia senjavinensis

Phenology Flowering mid–late summer.
Habitat Open calcareous gravelly slopes in tundra or heath, sandy slopes above high tide
Elevation 0–600 m (0–2000 ft)
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; e Asia (Russian Far East, Chukotka)
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

(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.)

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
Source FNA vol. 19, p. 505. FNA vol. 19, p. 532.
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. 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. 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
Synonyms A. campestris subsp. borealis Ajania senjavinensis, A. androsacea
Name authority Pallas: Reise Russ. Reich. 3: 755. (1776) Besser: Nouv. Mém. Soc. Imp. Naturalistes Moscou 3: 35. (1834)
Web links