Cephalanthus
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Authority
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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Family
Rubiaceae
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Scientific Name
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Description
Genus Description - Fls 4-merous; hypanthium obovoid; cal short; cor slenderly funnelform, the short lobes imbricate in bud; filaments short; ovary bilocular, with 1–3 pendulous ovules per locule; style elongate, long-exsert; stigma capitate; fr eventually splitting from the base upward into indehiscent nutlets; shrubs or small trees with fls densely crowded into globose pedunculate heads. 6, widespread.