de Lange, P. J.; Rolfe, J. R.; Barkla, J. W.; Courtney, S. P.; Champion, P. D.; Perrie, L. R.; Beadel, S. M.; Ford, K. A.; Breitwieser, I.; Schönberger, I.; Hindmarsh-Walls, R.; Heenan, P. B.; Ladley, K. (2018). Conservation status of New Zealand indigenous vascular plants, 2017(PDF) (Report). Department of Conservation. p. 31. ISSN2324-1713. Retrieved 2020-06-14.
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de Lange, P. J.; Rolfe, J. R.; Barkla, J. W.; Courtney, S. P.; Champion, P. D.; Perrie, L. R.; Beadel, S. M.; Ford, K. A.; Breitwieser, I.; Schönberger, I.; Hindmarsh-Walls, R.; Heenan, P. B.; Ladley, K. (2018). Conservation status of New Zealand indigenous vascular plants, 2017(PDF) (Report). Department of Conservation. p. 31. ISSN2324-1713. Retrieved 2020-06-14.