Flora of North America species comparison

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Artemisia rupestris

Artemisia douglasiana

sagebrush

California mugwort, Douglas' mugwort, Douglas' sagewort, Douglas' wormwood, mugwort, northwest mugwort
Habit Perennials, 5–15(–25) cm (cespitose), faintly aromatic. Perennials, 50–180(–250) cm, aromatic (rhizomatous).
Stems

brownish purple, glabrous.

1–20, erect, brown to gray-green, simple, hairy or glabrescent.
Leaves

deciduous, bright green;

blades (proximalmost petiolate) ovate, 1.5–5 × 1–2.5 cm, 2–3-pinnately lobed (cauline sessile, ternately or pinnately lobed, terminal lobes lance-linear, 1–6 × 0.5–1 mm), faces glabrous or sparsely hairy, glandular.

cauline, bicolor (white and green to light gray-green);

blades narrowly elliptic to widely oblanceolate, (1–)3–11(–15) × 0.5–2(–6) cm (proximal with 3–5 lateral lobes, distal mostly entire), faces sparsely tomentose (abaxial) to sparsely hairy (adaxial).
Involucres

globose, 4–5(–7) × 4–5(–7) mm.

narrowly turbinate to campanulate, 2–3 × 2–4 mm.
Florets

pistillate 14–16 (glandular, style branches exsert, linear, spreading);

bisexual 40–70;

corollas 1.5–2 mm, glabrous or glandular (styles shorter than corollas).

pistillate 6–10;

bisexual 6–25;

corollas pale yellow, 1–1.5 mm, glabrous, sometimes glandular.
Phyllaries

green (margins light green), ± hairy.

(green to gray) ovate, tomentose to pubescent.
Heads

(5–9, pedunculate or sessile, spreading or drooping) in spiciform arrays 3–9 × 0.5–1 cm.

(usually nodding) in (leafy) paniculiform arrays 10–30 × 3–9 cm (branches widely spreading, ascending, stout).
Cypselae

ca. 1 mm (apices flat), glabrous.

ellipsoid, 0.5–1 mm, glabrous.
2n

= 54.

Artemisia rupestris

Artemisia douglasiana
Phenology Flowering late summer–fall. Flowering mid spring–late fall.
Habitat Steppes, alkaline meadows, stony slopes Meadows, shaded sites, along drainages
Elevation 0–1400 m (0–4600 ft) 100–2200 m (300–7200 ft)
Distribution
from FNA
YT; Asia
[BONAP county map]
from FNA
CA; NV; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

The sole North American occurrence of Artemisia rupestris in southwestern Yukon is a remarkable disjunction from the Asiatic range of this species.

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

Artemisia douglasiana is sometimes weedy. Reports from areas outside the northwestern portion of the United States are based on misidentifications of plants in the A. ludoviciana complex.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 520. FNA vol. 19, p. 524.
Parent taxa Asteraceae > tribe Anthemideae > Artemisia > subg. Absinthium 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. 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. 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. 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
Synonyms Absinthium viridifolium var. rupestre, A. rupestris subsp. woodii A. campestris var. douglasiana, A. caudata var. douglasiana, A. commutata var. douglasiana, A. desertorum var. douglasiana, A. heterophylla, A. ludoviciana var. douglasiana, A. vulgaris var. douglasiana
Name authority Linnaeus: Sp. Pl. 2: 847. (1753) Besser: in W. J. Hooker, Fl. Bor.-Amer. 1: 323. (1833)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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