Achillea millefolium

Erect herb to c. 1 m high, unbranched above base; stems terete, striate, pubescent. Leaves sessile, oblanceolate to narrow-elliptic in outline, 1- or 2-pinnatisect, usually 2–10 cm long and 8–25 mm wide, pubescent to glabrescent; rachis c. 1 mm wide, not winged, lobed or toothed between primary pinnae; primary pinnae usually more than 15 per leaf, ovate to lanceolate, mostly 5–20 mm long; ultimate lobes spreading in more than one plane. Capitula in dense compound corymbs, 4–6 mm diam.; involucral bracts oblong, 1–5 mm long, pubescent, margins dark and scarious. Ray florets c. 5; ligules c. 2.5 mm long, white, pink or mauve. Disc florets c. 2 mm long, white or cream. Cypselas to 3 mm long. Flowers Oct.–Apr.