Heenan, P.B.; de Lange, P.J.; Cameron, E.K.; Ogle, C.C.; Champion, P.D. 2004: Checklist of dicotyledons, gymnosperms, and pteridophytes naturalised or casual in New Zealand: additional records 2001–2003. New Zealand Journal of Botany 42: 797–814.
New Zealand Carnivorous Plant Society Inc. 1988: The New Zealand Carnivorous Plant Society Plant List.
Wood, A. 1861: A Class-book of Botany. Edition s.n., 1861.
Wood, A. 1863: Leaves and Flowers. Barnes & Burr, New York.