Sphinctanthus is a genus of flowering plants in the family Rubiaceae, native to tropical South America. It is in a clade with Rosenbergiodendron and Tocoyena.
Species Currently accepted species include:
Sphinctanthus acutilobus Huber Sphinctanthus aurantiacus (Standl.) Fagerl. Sphinctanthus fluvii-dulcis Delprete & C.H.Perss. Sphinctanthus hasslerianus Chodat Sphinctanthus insignis Steyerm. Sphinctanthus maculatus Spruce ex K.Schum. Sphinctanthus microphyllus K.Schum. Sphinctanthus polycarpus (H.Karst.) Hook.f. Sphinctanthus striiflorus (DC.) Hook.f. ex K.Schum.
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