References

For Diodia

Bacigalupo, N.M., and E.L. Cabral. 1999. Revisión de las especies americanas del género Diodia (Rubiaceae, Spermacoceae). Darwiniana 37: 153-165. Google Scholar

Rogers, G.K. 2005. The genera of Rubiaceae in the southeastern United States, part II. Subfamily Rubioideae, and subfamily Cinchonoideae revisited (Chiococca, Erithalis, and Guettarda). Harvard Papers in Botany 10: 1-45. Google Scholar

Sorrie, B.A. 2016a. Reinstatement of Diodia harperi (Rubiaceae), a southeastern USA Coastal Plain endemic. Phytoneuron 2016-3: 1-13. Published 7 January 2016. ISSN 2153 733X Google Scholar