In botany, another name for iris, especially yellow flag Iris pseudacorus, which grows wild in damp places throughout Europe; it is a true water plant but adapts to border conditions. It has a thick rhizome, stiff, bladelike, monocotyledonous leaves, and stems up to 150 cm/5 ft high. The flowers are large and yellow.

ETYM Latin iris, iridis, the goddess, Greek iris, the rainbow, iris of the eye, the plant Iris. Related to Orris.
Plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals; SYN. flag, fleur-de-lis, sword lily.
In botany, perennial northern temperate flowering plants of the genus Iris, family Iridaceae. The leaves are usually sword-shaped; the purple, white, or yellow flowers have three upright inner petals and three outward-and downward-curving sepals. The wild yellow iris is called flag.

A showy often-cultivated plant with tawny yellow often purple-spotted flowers; SYN. Sparaxis tricolor.