New Zealand Plant Names Database
Farjon, A 2001: World Checklist and Bibliography of Conifers. 2 ed. Richmond, Royal Botanic Gardens, Kew.
Mabberley, D. J. 2008: Mabberley's plant book, a portable dictionary of plants, their classification and uses. 3rd ed. Cambridge University Press. 1021 p.
NZFLORA February 2012
Webb, C. J. ; Sykes, W. R. ; Garnock-Jones, P. J. 1988: Flora of New Zealand. Vol. IV. Naturalised Pteridophytes, Gymnosperms, Dicotyledons. Christchurch, New Zealand, Botany Division, D. S. I. R.
Accessed via http://www.gbif.org/species/117069221 on 2015-03-04