Achillea L.

2 species naturalized Aust.; all states and territories except NT

*Achillea millefolium L.

Perennial herb up to 1 m high. Leaves basal and cauline, alternate, narrow- lanceolate in outline, thrice pinnatisect, up to 20 cm long. Heads in a dense broad corymb. Involucre ovoid to elliptic, 3–4 mm diam. Ray florets 5; ray white or pink rarely red, 3-lobed, 1–3 mm long. Disc florets yellow. Cypselas compressed, 1.5 mm long. Pappus absent. Blue Mts, Illawarra district. Weed in moist situations. Introd. from Europe. Fl. spring–summer. Milfoil or Yarrow