Flora of North America species comparison

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Artemisia rigida

scabland sagebrush, stiff sagebrush
Habit Shrubs, 20–40 cm (branches widely spreading), mildly aromatic; root-sprouting (caudices stout).
Stems

gray (coarse, brittle), hairy (bark gray, exfoliating).
Leaves

deciduous, silver-gray (rigid);

blades broadly spatulate, 1.5–4 × 0.5–0.7 cm (bases narrow), 3-lobed (lobes 1/2+ blade lengths, ca. 1 mm wide), faces densely hairy.
Involucres

narrowly campanulate, 4–5 × 2.5–3.5 mm.
Florets

4–8;

corollas yellowish red to red, 2–2.8 mm (style branches oblong, truncate, exsert).
Phyllaries

elliptic (acute to obtuse), densely canescent.
Heads

borne singly or (in glomerules) in (densely leafy) spiciform or paniculiform arrays 2–20 × 2 cm.
Cypselae

(4–5-ribbed) 1–1.5 mm, glabrous.
2n

= 18, 36.

Artemisia rigida
Phenology Flowering mid summer–early fall.
Habitat Dry rocky scablands, volcanic plains
Elevation 1500–1800 m (4900–5900 ft)
Distribution
from FNA
ID; MT; OR; WA
[WildflowerSearch map]
[BONAP county map]
Discussion

Artemisia rigida is an important successional species following fires because the plants form new shoots from the underground caudices. This characteristic aligns the species with other ‘sprouters’ in the subgenus, namely A. cana, A. tripartita, and A. arbuscula.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 19, p. 515.
Parent taxa 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. 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. rothrockii, A. rupestris, A. scopulorum, A. senjavinensis, A. serrata, A. spiciformis, A. stelleriana, A. suksdorfii, A. tilesii, A. tridentata, A. tripartita, A. vulgaris
Synonyms A. trifida var. rigida, Seriphidium rigidum
Name authority (Nuttall) A. Gray: Proc. Amer. Acad. Arts 19: 49. (1883)
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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