Oxalis triangularis subsp. papilionaceaOxalis triangularis subsp. papilionacea Purple Shamrock A very dapper tuberous perennial with striking triangular purple foliage. This low maintenance plant exhibits photonastic movement, with leaves and flowers that fold at night and reopen with daylight. Thrives in partial shade with moderate watering, and produces delicate pink white flowers throughout the warmer seasons. An excellent, easy care choice for indoor growing. In frost free areas it is