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purple wormwood

dwarf sagebrush, hoary sagebrush, silver sagebrush, silver wormwood, sticky sagebrush

Habit Perennials, (3–)5–16(–30) cm (cespitose), faintly aromatic (not rhizomatous, taproots stout, caudices simple or branched, proximal branches clothed with persistent leaf bases). Shrubs, 50–150 cm (trunks definite, freely branched from bases, branches erect), pleasantly aromatic; root-sprouting.
Stems

1–5, erect, whitish gray, densely tomentose.

light brown to gray-green (woody, somewhat pliable, leafy), persistently canescent to glabrescent.

Leaves

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.

deciduous, whitish gray or green to dark gray-green;

blades narrowly elliptic to lanceolate, 1.5–8 × 0.2–1 cm, usually entire, sometimes irregularly lobed, sparsely to densely hairy.

Involucres

campanulate or hemispheric, 3.5–6 × 6–11 mm.

(subtended by green, leaflike bracts) narrowly to broadly campanulate, 3–4 × 2–5 mm.

Florets

pistillate 9–10;

bisexual 20–30;

corollas yellow or reddish black, 2–3 mm, sometimes glandular.

4–20;

corollas 2–3 mm, resinous (style branches ellipsoid, to 2.3 mm, exsert, gland-dotted).

Phyllaries

lanceolate (margins brown), pilose.

ovate or lanceolate (scarious margins nearly invisible), densely canescent.

Heads

(2–20, peduncles 0 or to 25 mm) in subcapitate to capitate arrays 2–3 × 2–3 cm.

in (congested, leafy) paniculiform arrays 10–20 × 0.2–7 cm.

Cypselae

oblong, 1.5–2.5 mm, (apices flattened) glabrous.

(light brown) 1–2.3 mm, resinous.

Artemisia globularia

Artemisia cana

Distribution
from FNA
AK; YT; Asia
[BONAP county map]
from FNA
AZ; CA; CO; ID; MT; ND; NE; NM; NV; OR; SD; UT; WY; AB; BC; MB; SK
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Subspecies 3 (3 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
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
1. Shrubs 100–150 cm; leaves 2–8 cm (entire); primarily e of continental divide
subsp. cana
1. Shrubs 50–90 cm; leaves 1.5–4 cm (usually some with irregular lobes); w of continental divide
→ 2
2. Stems felty-tomentose; leaves green to gray-green; involucres 4–5 mm diam.; California, Nevada, Oregon
subsp. bolanderi
2. Stems hairy (not felty-tomentose); leaves green to dark green; involucres 2–3(–4) mm diam.; Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, Wyoming
subsp. viscidula
Source FNA vol. 19, p. 525. FNA vol. 19, p. 512.
Parent taxa Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia Asteraceae > tribe Anthemideae > Artemisia > subg. Tridentatae
Sibling taxa
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
A. abrotanum, A. absinthium, A. alaskana, A. aleutica, A. annua, A. arbuscula, A. biennis, A. bigelovii, A. borealis, A. californica, A. campestris, 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
Subordinate taxa
A. globularia subsp. globularia, A. globularia subsp. lutea
A. cana subsp. bolanderi, A. cana subsp. cana, A. cana subsp. viscidula
Synonyms Ajania globularia, A. norvegica subsp. globularia Seriphidium canum
Name authority Chamisso ex Besser: Nouv. Mém. Soc. Imp. Naturalistes Moscou 3: 64. (1833) Pursh: Fl. Amer. Sept. 2: 521. (1813)
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