|any of several onagraceous plants of the genus Circaea, esp C. lutetiana, having small white flowers and bristly fruits|
any herbaceous perennial plant of the genus Circaea, in the evening primrose family (Onagraceae), that occurs in damp woodlands of the Northern Hemisphere. The plants have slender stems with opposite leaves. The small, white, two-petaled flowers grow in clusters, and the fruits have hooked bristles.
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