Artemisia rothrockii
Artemisia campestris
Rothrock sagebrush, sticky sagebrush, timberline sagebrush
beach wormwood, field sagewort, field wormwood, northern wormwood, Pacific sagewort, sand wormwood
white (becoming dark gray with age), canescent (bark exfoliating).
usually 1–5, turning reddish brown, (often ribbed) tomentose or glabrous.
persistent, light or dark gray-green;
blades long-cuneate to lanceolate, (0.4–)1–1.5(–2) × 0.2–0.4 cm, 3-lobed (lobes to 1/3 blade lengths, rounded, margins sometimes entire, somewhat wavy), faces densely to sparsely canescent, gland-dotted, sticky-resinous.
persistent or deciduous, mostly basal;
basal blades 4–12 cm;
cauline gradually reduced, 2–4 × 0.5–1.5 cm, 2–3-pinnately lobed, lobes linear to narrowly oblong, apices acute, faces densely to sparsely white-pubescent.
broadly ovoid, 3–5 × 4–6 mm.
broadly turbinate, 2.5–3(–5) × 2–3.5(–7) mm.
12–20;
corollas 2.5–3.5 mm.
pistillate 5–20; functionally staminate 12–30;
corollas pale yellow, sparsely hairy or glabrous.
(usually gray-green) ovate, densely or sparsely canescent.
(margins scarious) glabrous or villous-tomentose.
(erect, sessile or pedunculate) in paniculiform arrays, 5–15 × 1–2(–3) cm.
(pedunculate) in (mostly leafless) paniculiform arrays.
0.8–2 mm, (smooth), resinous.
oblong-lanceoloid, somewhat compressed, 0.8–1 mm, faintly nerved, glabrous.
= 36, 54, 72.
Artemisia rothrockii
Artemisia campestris
Artemisia rothrockii is known only from the central and southern Sierra Nevada and the White Mountains of California. In the Rocky Mountains, A. spiciformis has been confused with A. rothrockii. Distinctive chemistry and anatomical structure of the leaves support the distinctness of A. rothrockii (L. M. Shultz 1986b). Intermediate characteristics suggest a hybrid origin from races of A. cana and A. tridentata.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Subspecies ca. 7 (3 in the flora).
Artemisia campestris varies; each morphologic form grades into another. The present circumscription is conservative in that only three subspecies are recognized; the subspecies usually can be separated geographically as well as morphologically. Populations in western North America consist primarily of subsp. pacifica; east of the continental divide, plants are assigned to subsp. canadensis in northern latitudes and to subsp. caudata in southern latitudes.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Perennials; stems 2–5; basal rosettes persistent | subsp. pacifica |
1. Biennials; stems 1(–3); basal rosettes not persistent (withering before flowering) | → 2 |
2. Involucres globose, 3–4 × 3.5–5 mm; n of 50°, primarily Canada | subsp. canadensis |
2. Involucres turbinate, 2–3 × 2–3 mm; s of 50°, e from Rocky Mountains to coastal North America | subsp. caudata |
- Local floras:
BC, 
OR, 
WA - Local Web sites:
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Flora NW, 
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KS Wildflowers, 
MI Flora, 
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WildflowerSearch
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USDA Plants Database- LBJ Wildflower Center
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