Hobbs, J.; Hatch, T. 1994: Bulbs for New Zealand Gardens. Godwit Press, Auckland.
Planchon, J.E. 1857: Oxalis corniculata, L. var. atropurpurea. Flore des Serres et des Jardins de l'Europe 12: 47–48.
Sykes, W.R. 2009: The Oxalis corniculata group. New Zealand Journal of Botany 47: 107–113.