Viola lyallii, haaka, or New Zealand native violet is endemic to the North and South Islands, but uncommon north of the Waikato. It is an abundant species of coastal, lowland and montane to subalpine wetlands, swamps, bogs and mires, also in wet places within riparian forest.  It is found from sea-level to 1800m asl, and is most common in lowland to montane wetlands. This small creeping perennial herb up to 10cm tall with pale green heart shaped leaves. It likes filtered light and a moist soil, and could be easily grown in a rock garden with these conditions. It has white flowers from October to January with some purplish-pink on petals.