| Campanulaceae | |
Clermontia oblongifolia fo. brevipes
| E. Wimm. | Pflanzenr. IV, 276b(107): 88 | 1963 |
| Campanulaceae | |
Clermontia oblongifolia subsp. brevipes
| Lammers | Syst. Bot. 13: 500 | 1988 |
| Campanulaceae | |
Clermontia oblongifolia fo. glabra
| H. St. John | Nordic J. Bot. 3: 545 | 1983 |
| Campanulaceae | |
Clermontia oblongifolia fo. kaalae
| O. Deg. | Fl. Hawaiiensis Fam. 339(without vol. number): without page number | 1937 |
| Campanulaceae | |
Clermontia oblongifolia fo. mauiensis
| O. Deg. | Fl. Hawaiiensis 339: s.p. | 1937 |
| Campanulaceae | |
Clermontia oblongifolia subsp. mauiensis
| Lammers | Syst. Bot. 13: 500 | 1988 |
| Campanulaceae | |
Clermontia oblongifolia var. mauiensis
| Rock | Indig. Trees Haw. Isl. 476 | 1913 |
| Campanulaceae | |
Clermontia oblongifolia subsp. oblongifolia
| | | |