Scientific Name:
Sophora howinsula (W.R.B.Oliv.) P.S.Green
  • Sophora tetraptera var. howinsula W.R.B.Oliv.
  • = Sophora tetraptera 'Otari Gnome'
Heenan, P.B. 1992: The origin of Sophora 'Gnome' and the growth habit of Sophora 'Earlygold'. Horticulture in New Zealand, Journal of the Royal New Zealand Institute of Horticulture 3(1): 2–6.
Ogle, C.C.; de Lange, P.J.; Cameron, E.K.; Parris, B.S.; Champion, P.D. 2021: Checklist of dicotyledons, gymnosperms and pteridophytes naturalised or casual in New Zealand: additional records 2007–2019. Perspectives in Biosecurity Research Series 5: 45–116.