Genus Rhynchocalyx
Rhynchocalyx lawsonioides is a small flowering tree, the sole species of family Rhynchocalycaceae.Species in the genus Rhynchocalyx of plants
Rhynchocalyx lawsonioides - Schönenberger, J. and Conti, E., 2003. Molecular phylogeny and floral evolution of Penaeaceae, Oliniaceae, Rhynchocalycaceae, and Alzateaceae . American Journal of Botany 90: 293-309.