For Borreria
Bacigalupo, N.M. 1972. Observaciones sobre algunas especies de los géneros Spermacoce L. y Spermacoceodes O.K. (Rubiaceae). Darwiniana 17: 341-357.
Florentín, M.N., J.E. Florentín, and R.M. Salas. 2020. Integrative taxonomic analyses sheds light on three historically disputed American Spermacoce species, and a key to the American species of Spermacoce (Spermacoceae, Rubiaceae). Syst. Bot. 45: 585-606.
Franck, A.R., G.D. Gann, J. Sadle, and A. Farid. 2021. Sharpening plant taxonomy in south Florida: Baccharis and Melanthera (Asteraceae), Borreria and Chiococca (Rubiaceae), and Lantana (Verbenaceae). Phytologia 103: 29-68.
Nepomuceno, F.Á.A., E.B. de Souza, I.V. Nepomuceno, L.M. Miguel, E.L. Cabral, and M.I.B. Loiola. 2018. O gênero Borreria (Spermacoceae, Rubiaceae) no estado do Ceará, Brasil. Rodriguésia 69: 715-731.
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.
Ward, D.B. 2011b. Keys to the flora of Florida – 29, Spermacoce (Rubiaceae). Phytologia 93: 275-282.
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