John, H.S. A plant collection from Niue Island by Jensen in 1876 pacific plant studies 29. Bot. Mag. Tokyo 89, 235–240 (1976). https://doi.org/10.1007/BF02488345
Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6. Scientific Data 8: 215.
