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DescriptionPerennial herbs, dying back each year, with corms. Foliage leaves 1-several. Inflorescence composed of rhipidia; rhipidia 1 per branch or crowded terminally, each enclosed in a pair of spathes. Flowers actinomorphic, Iris-like, usually blue or yellow. Ovary long-pedicellate. Style divided into 3 flat petaloid branches, these apically forked into 2 crests; stigma transverse and abaxial below base of crests. Anthers appressed to the style branches. Fruit a capsule.