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DescriptionHerbs. Leaves spirally arranged, compound with sheathing bases. Inflorescence a terminal panicle. Flowers bisexual, or some male only, actinomorphic. Perianth segments 3-5, imbricate in bud, green or petaloid. Petals 0. Stamens often with conspicuous anthers. Carpels 1-numerous, 1-ovulate. Achenes with stigma persistent, forming a long beak (in ours).