Achillea distans subsp. tanacetifolia

Erect herb to c. 1.2 m high, sometimes branched above base; stems striate, pubescent. Leaves sessile, lanceolate in outline, pinnatisect, usually 5–20 cm long and 10–30 mm wide, pubescent to glabrescent; rachis 1–2 mm wide, winged, lobed or toothed between primary pinnae; primary pinnae usually more than 15 per leaf, ovate to lanceolate, mostly 5–25 mm long; ultimate lobes spreading in 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, 2–4 mm long, white, pink or red. Disc florets c. 2.5 mm long, yellow. Cypselas to 3 mm long.  Flowers spring and summer.