Oxalis triangularis, also known as false shamrock, is an eye-catching bulbous perennial that makes an excellent and long-lived house plant. Bold, dramatic foliage in shades of dark purple to wine-red creates a striking contrast to blush-white flowers borne in summer. The leaves are three-lobed, hence the name of shamrock which it resembles, though is not actually related to. Oxalis triangularis is native to from Brazil. Its leaves have extra fascination because they open during the day and close at night.