Eukaryota | Plantae | Pteridobiotina | Tracheophyta | Magnoliopsida | Gentianales | Rubiaceae | Rubioideae | Spermacoceae | Hexasepalum | Hexasepalum teres
COL:CS5HF | COL:P | COL:CMQ8S | COL:TP | COL:MG | COL:39D | COL:SGJN5 | COL:V58RX | COL:V5LGW | COL:8WGFS | COL:3LGTX
(Chatton, 1925) Whittaker & Margulis, 1978 |  | Britton & Brown |  |  | Juss. ex Bercht. & J.Presl | Juss. | Bremek. ex Verdc. | Cham. & Schltdl. ex DC. | Bartl. ex DC. | (Walter) J.H.Kirkbr.