Edwards, R. 2009: Lincoln University campus: a guide to some of the shrubs currently growing there. Edition 2. Lincoln University, Lincoln.
Linnaeus, C. 1753: Species Plantarum. Impensis Laurentii Salvii, Stockholm.
Mabberley, D.J. 2008: Mabberley's plant book, a portable dictionary of plants, their classification and uses. Edition 3. Cambridge University Press.