Bractlets of the epicalyx 3, linear to obovate; carpels numerous, at maturity hispid and 2-horned at the summit, dehiscent, with thin lateral walls, 2-seeded, the seeds separated by a triangular partial septum intruded from the outer wall; annual or biennial with divided lvs and small red-purple fls. Monospecific.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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