1. Allan, H. H. 1961.“Flora of New Zealand”, Vol. 1, 1,085–1,085. Wellington: Government Printer.
2. Cockayne, L. 1909b.“Report on a botanical survey of Stewart Island”, 68 pp–68 pp. Wellington: Government Printer.
3. Cockayne, L. 1928.“The Vegetation of New Zealand”, 2nd ed, 456–456. Leipzig: Engelmann.