Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. 1988. Flora of New Zealand, Volume IV: Naturalised pteridophytes, gymnosperms, dicotyledons. Botany Division, DSIR, Christchurch. 1365 pp.
Online details: http://floraseries.landcareresearch.co.nz/pages/Book.aspx?fileName=Flora%204.xml