Gleason & Cronquist
Vascular plants of NE US and adjacent Canada
Carpels 1-seeded; capsule eventually breaking into 5 deciduous segments, each composed of halves of adjacent carpels; seeds smooth; otherwise as in Hibiscus. 30, N. Amer., Afr., Madag.
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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