I don't recall ever seeing one of these in a Christchurch garden but it's certainly thriving.
Common in ephemeral tarn
Coming in to bud.
Violaceae /vaɪəˈleɪsiː/ (alternatively Alsodeiaceae J.G.Agardh, Leoniaceae DC. and Retrosepalaceae Dulac) is a family of flowering plants consisting of about 800 species in 21 genera. It takes its name from the genus Viola, the violets and pansies.