Achillea sibirica Ledeb.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Asteraceae
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Scientific Name
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Description
Species Description - Resembling no. 1 [Achillea ptarmica L.]; stems 5–8 dm; lvs 5–10 cm × 4–8 mm, incised; heads in a short, crowded, corymbiform infl; rays 6–13, 1–2 mm; disk-fls 25–30; 2n=36. Woods; ne. Asia to Man. and Minn.; Gaspé peninsula, Que. July, Aug.