| Rubiaceae | |
Damnacanthus indicus var. formosanus
| Nakai | Trees and Shrubs of Japan 407 | 1922 |
| Rubiaceae | |
Damnacanthus indicus var. giganteus
| Makino | Bot. Mag. (Tokyo) 18: 33 | 1904 |
| Rubiaceae | |
Damnacanthus indicus subsp. indicus
| | | |
| Rubiaceae | |
Damnacanthus indicus var. indicus
| | | |
| Rubiaceae | |
Damnacanthus indicus var. intermedius
| Matsum. | Bot. Mag. (Tokyo) 15: 16 | 1901 |
| Rubiaceae | |
Damnacanthus indicus var. lancifolius
| Makino | Bot. Mag. (Tokyo) 18: 33 | 1904 |
| Rubiaceae | |
Damnacanthus indicus fo. macrophyllus
| (Siebold & Miq.) Makino | Bot. Mag. (Tokyo) 18: 31 | 1904 |
| Rubiaceae | |
Damnacanthus indicus var. macrophyllus
| (Siebold & Miq.) Makino | Bot. Mag. (Tokyo) 11: 279 | 1897 |
| Rubiaceae | |
Damnacanthus indicus fo. major
| (Siebold & Zucc.) Makino | Bot. Mag. (Tokyo) 18: 32 | 1904 |
| Rubiaceae | |
Damnacanthus indicus subsp. major
| (Siebold & Zucc.) T. Yamaz. | J. Phytogeogr. Taxon. 35: 74 | 1987 |
| Rubiaceae | |
Damnacanthus indicus var. major
| (Siebold & Zucc.) Makino ex Nakai | Bot. Mag. (Tokyo) 11: 279 | 1897 |
| Rubiaceae | |
Damnacanthus indicus fo. microphyllus
| Makino | Bot. Mag. (Tokyo) 18: 31 | 1904 |
| Rubiaceae | |
Damnacanthus indicus var. microphyllus
| (Makino) Makino ex Nakai | Trees Shrubs Japan ed. 2: 542 | 1922 |
| Rubiaceae | |
Damnacanthus indicus var. okinawensis
| Hatus. | J. Phytogeogr. Taxon. 34: 9 | 1986 |
| Rubiaceae | |
Damnacanthus indicus var. ovatus
| Koidz. | Acta Phytotax. Geobot. 2: 225 | 1933 |
| Rubiaceae | |
Damnacanthus indicus var. parvispinus
| Koidz. | Pl. Nov. Amami-Ohsima 6 | 1928 |
| Rubiaceae | |
Damnacanthus indicus var. pseudogiganteus
| Hatus. | J. Phytogeogr. Taxon. 35: 63 | 1987 |