Flora of North America species comparison

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Artemisia rupestris

Artemisia biennis

sagebrush

armoise bisannuelle, biennial sagewort, biennial wormwood
Habit Perennials, 5–15(–25) cm (cespitose), faintly aromatic. Annuals or biennials, (10–)30–80(–150) cm, not aromatic.
Stems

brownish purple, glabrous.

1, erect, often reddish, simple (finely striate), glabrous.
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, green or yellow-green (sessile);

blades broadly lanceolate to ovate, 4–10(–13) × 1.5–4 cm, 1–2-pinnately lobed (ultimate lobes coarsely toothed), faces glabrous.
Involucres

globose, 4–5(–7) × 4–5(–7) mm.

globose, 2–4 × (1.5–)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 6–25;

bisexual 15–40;

corollas pale yellow, ca. 2 mm, glabrous.
Phyllaries

green (margins light green), ± hairy.

(green) broadly elliptic to obovate, glabrous.
Heads

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

(erect, subsessile) in (leafy) paniculiform to spiciform arrays 12–35(–40) × 2–4 cm (lateral branches relatively short).
Cypselae

ca. 1 mm (apices flat), glabrous.

ellipsoid (4–5-nerved), 0.2–0.9 mm, glabrous.
2n

= 18.

Artemisia rupestris

Artemisia biennis
Phenology Flowering late summer–fall. Flowering mid summer–late fall.
Habitat Steppes, alkaline meadows, stony slopes Disturbed habitats, margins of vernal pools, desert flats, usually clay or silty soils
Elevation 0–1400 m (0–4600 ft) 600–2000 m (2000–6600 ft)
Distribution
from FNA
YT; Asia
[BONAP county map]
from FNA
AK; AZ; CA; CO; CT; DE; IA; ID; IL; IN; KS; KY; MA; MD; ME; MI; MN; MO; MT; ND; NE; NH; NJ; NM; NV; NY; OH; OR; PA; RI; SD; UT; VT; WA; WI; WV; WY; AB; BC; MB; NB; NS; NT; ON; PE; QC; SK; YT [Introduced in Europe, Pacific Islands (New Zealand)]
[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 biennis is naturalized and weedy in the eastern portion of its range. It is morphologically similar to A. annua, differing primarily in the coarser leaf lobes and larger heads that are sessile in axils of leaflike bracts. Artemisia biennis is considered native to the northwest United States; it may be introduced in other parts of its range. The type specimen is a horticultural specimen from New Zealand.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 520. FNA vol. 19, p. 523.
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. 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. 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. biennis var. diffusa
Name authority Linnaeus: Sp. Pl. 2: 847. (1753) Willdenow: Phytographia, 11. (1794)
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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