All Floras      Advanced Search
FNA Vol. 19, 20 and 21 Page 505, 506, 507, 508 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 19, 20 and 21 | Asteraceae | Artemisia

3. Artemisia campestris Linnaeus, Sp. Pl. 2: 846. 1753.

Field sagewort, sand wormwood

Biennials or perennials, (10–)30–80(–150) cm, faintly aromatic; taprooted, caudices branched. Stems usually 1–5, turning reddish brown, (often ribbed) tomentose or glabrous. Leaves 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. Heads (pedunculate) in (mostly leafless) paniculiform arrays. Involucres broadly turbinate, 2.5–3(–5) × 2–3.5(–7) mm. Phyllaries (margins scarious) glabrous or villous-tomentose. Florets: pistillate 5–20; functionally staminate 12–30; corollas pale yellow, sparsely hairy or glabrous. Cypselae oblong-lanceoloid, somewhat compressed, 0.8–1 mm, faintly nerved, glabrous.

Subspecies ca. 7 (3 in the flora): North America, especially mountains and high latitudes; Eurasia.

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.

1 Perennials; stems 2–5; basal rosettes persistent   3c Artemisia campestris subsp. pacifica
+ Biennials; stems 1(–3); basal rosettes not persistent (withering before flowering)   (2)
2 (1) Involucres globose, 3–4 × 3.5–5 mm; n of 50°, primarily Canada   3a Artemisia campestris subsp. canadensis
+ Involucres turbinate, 2–3 × 2–3 mm; s of 50°, e from Rocky Mountains to coastal North America   3b Artemisia campestris subsp. caudata


Related Objects Image Gallery 
  • Distribution Map
  • Map
  • Illustration
  • Illustration

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |