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ValerianaceaePlants of the Valerian FamilyNorth American members of this family have small flowers in clusters. The flowers can be bisexual or unisexual, regular or slightly irregular. The sepals are inconspicuous. There are 5 united petals, often with a spur at the base of the flower. There are 1 to 4 stamens. The ovary is positioned inferior and consists of 3 united carpels (tricarpellate) but aborts two, forming just 1 chamber. It produces an achene (a dry seed). Worldwide, there are 13 genera and 400 species. Three genera are found in North America. Red valerian (Centranthus) is cultivated. Key Words: Plants with basal and opposite leaves. Please e-mail Thomas J. Elpel to report mistakes or to inquire about purchasing high resolution photos of these plants.
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