Artemisia campestris
Artemisia biennis
beach wormwood, field sagewort, field wormwood, northern wormwood, Pacific sagewort, sand wormwood
armoise bisannuelle, biennial sagewort, biennial wormwood
usually 1–5, turning reddish brown, (often ribbed) tomentose or glabrous.
1, erect, often reddish, simple (finely striate), glabrous.
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.
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.
broadly turbinate, 2.5–3(–5) × 2–3.5(–7) mm.
globose, 2–4 × (1.5–)2–4 mm.
pistillate 5–20; functionally staminate 12–30;
corollas pale yellow, sparsely hairy or glabrous.
pistillate 6–25;
bisexual 15–40;
corollas pale yellow, ca. 2 mm, glabrous.
(margins scarious) glabrous or villous-tomentose.
(green) broadly elliptic to obovate, glabrous.
(pedunculate) in (mostly leafless) paniculiform arrays.
(erect, subsessile) in (leafy) paniculiform to spiciform arrays 12–35(–40) × 2–4 cm (lateral branches relatively short).
oblong-lanceoloid, somewhat compressed, 0.8–1 mm, faintly nerved, glabrous.
ellipsoid (4–5-nerved), 0.2–0.9 mm, glabrous.
= 18.
Artemisia campestris
Artemisia biennis
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.)
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.)
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:
CalFlora, CalPhotos, 
Flora NW, 
Go Botany, 
IL Wildflowers, 
KS Wildflowers, 
MI Flora, 
MN Wildflowers, 
MO Plants, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
- Local floras: BC, CA, OR, WA
- Local Web sites: CalFlora, CalPhotos, Flora NW, Go Botany, IL Wildflowers, KS Wildflowers,
MD Biodiversity, MI Flora, MN Wildflowers, MO Plants, PNW Herbaria - WildflowerSearch
- iNaturalist (observations)
- USDA Plants Database
- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
