Fern-leaf yarrow

Achillea filipendulina, commonly known as fernleaf yarrow or milfoil, is a robust aromatic perennial herb of the family Asteraceae, native to the Caucasus, eastern Anatolia, Iran and Central Asia, and widely cultivated as a garden ornamental and cut-flower throughout the temperate world. It forms an erect, leafy clump 60–150 cm tall arising from a stout rhizome, with stiff, finely pubescent, unbranched stems. The leaves are alternate, fern-like, 10–25 cm long, oblong-lanceolate in outline and 2- to 3-pinnatisect into many fine, linear-lobed segments, grey-green and softly hairy with a strong aromatic scent when crushed. The inflorescence is a dense, flat-topped compound corymb 8–15 cm across, often more than 100 small heads packed tightly together; each head is 4–5 mm across, with 5–6 short, golden-yellow ray florets surrounding a small disc of yellow tubular florets. The involucral bracts are imbricate and finely pubescent. The fruit is a small flattened achene without a pappus. Flowering occurs from early to late summer.