These lovely spring flowers have clover-like, delicate, fresh green foliage (they are often called shamrocks). The five-petalled, bowl- or cup-shaped flowers open and close depending on the level of sunlight - closing when it's overcast and at night.

Oxalis laciniata has flowers that are shiny violet-blue with prominent veins on short stems. This is one of the parents of 'Ione Hecker'.