| Campanulaceae | |
Cyanea angustifolia fo. elliptica
| Rock | Occas. Pap. Bernice Pauahi Bishop Mus. 22: 64 | 1957 |
| Campanulaceae | |
Cyanea angustifolia var. elliptica
| (Rock) E. Wimm. | Pflanzenr. IV, 276c: 821 | 1968 |
| Campanulaceae | |
Cyanea angustifolia var. hillebrandii
| Rock | | |
| Campanulaceae | |
Cyanea angustifolia var. isabella
| E. Wimm. | | |
| Campanulaceae | |
Cyanea angustifolia var. lanaiensis
| Rock | | |
| Campanulaceae | |
Cyanea angustifolia var. racemosa
| Hillebr. | | |
| Campanulaceae | |
Cyanea angustifolia fo. subpubescens
| E. Wimm. | Pflanzenr. IV, 276b: 71 | 1943 |
| Campanulaceae | |
Cyanea angustifolia var. tomentella
| Hillebr. | | |