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DescriptionHerbs, smelling strongly of onions. Rootstock a rhizome or bulb. Flowers in umbels, subtended by 2 spathe-like bracts, borne on a solitary peduncle. Perianth segments united into a tube for about half their length; mouth of tube with a fleshy corona which is cylindric or composed of 3 free scales. Capsule loculicidal. Seeds numerous, triangular, black.