Iris pseudacorus

Leaves 40–100 cm long, 1–3 cm wide. Inflorescences usually exceeding leaves, with scape up to 160 cm long, 1- or 2-branched, with 2–4 condensed 2–6-flowered clusters. Primary bracts 6–13 cm long. Flowers yellow, usually with some brown or violet veining and a darker yellow zone (absent in some forms). Perianth tube 1–1.5 cm long; sepals broadly ovoid to broadly obovoid or rhombic, 4.5–6 cm long, recurved, glabrous; petals distinctly narrower than sepals, 2–4 cm long, ascending to recurved, glabrous. Seeds dull brown. Flowers Oct.–Nov.