Artemisia tripartita
Mem. New York Bot. Gard. 1: 432. 1900.
Shrubs, 5–15 or 20–150 (–200) cm, aromatic; root-sprouting (caudices with adventitious-buds, fibrous-rooted). Stems pale gray, glabrous. Leaves deciduous, gray-green; blades broadly cuneate, 1.5–4 × 0.5–2 cm, deeply 3-lobed (lobes 1–1.4 mm wide, acute; cauline leaves smaller, mostly 3-lobed). Heads in paniculiform or spiciform arrays (5–) 8–15 (–35) × (0.5–) 1–5 cm. Involucres globose or turbinate, 2–4 × 1.5–3 mm. Phyllaries broadly lanceolate (margins scarious, obscured by indument), canescent. Florets 3–11; corollas 2–2.5 mm, glandular (style-branches included). Cypselae (columnar, unequally ribbed) 1.8–2.3 mm, glabrous or resinous.
Distribution
B.C., Idaho, Nev., Oreg., Wash., Wyo.
Discussion
Subspecies 2 (2 in the flora).
Selected References
None.
Key
| 1 | Shrubs 20–150(–200) cm; lobes of leaves linear, to 0.5 mm wide; loamy soils, w of continental divide | Artemisia tripartita subsp. tripartita |
| 1 | Shrubs 5–15 cm; lobes of leaves lanceolate, 1–1.5 mm wide; stony grasslands, e Wyoming | Artemisia tripartita subsp. rupicola |