Common Yarrow - Achillea millefolium
(see State Rank Reason below)
MNPS Threat Rank
State Rank Reason (see State Rank above)
Abundant and widespread across Montana in various habitats. Also tolerant of disturbance.
Stems ascending to erect, simple, 6–60 cm. Herbage sparsely- to tangled-wooly. Leaves basal and cauline, petiolate below; blades narrowly oblanceolate, 1–15 cm long, finely, 3 times pinnately dissected; ultimate lobes 1–2 × 1 mm. Inflorescence hemispheric 2–15 cm across with numerous heads. Involucre 3–5 × 2–4 mm; bracts in 3 series; outer bracts green with brown, fimbriate margins, sparsely glandular. Rays 5 to 12, white (rarely pink); ligules 2–3 mm long, not quite as wide. Disk flowers white,10 to 30; corolla 2–5 mm long. Achenes glabrous, 1–2 mm long, obscurely winged (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Grasslands, meadows, sagebrush steppe, open forest, talus, fellfields; all elevations (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)