Ruellia tuberosa is a perennial flowering plant that belongs to the Acanthaceae family. It is native to tropical America and is commonly known as 'Miner's Root', 'Popping Pod', or 'Sapphire Flower'. The plant has a tuberous root system and grows up to 3 feet (91 cm) tall. It has lance-shaped leaves and produces funnel-shaped flowers that are blue or purple in color.