Tradescantia is a genus of plants native to the Americas, named after John Tradescant, a famous 17th-century plant-hunter. Many species grow outdoors, but three, in particular, make lovely houseplants, with long stems that trail elegantly over the edges of pots and hanging baskets. Tradescantia zebrina has green and silver variegated leaves that show a flash of purple on the undersides. Tradescantia pallida has dark purple leaves, and Tradescantia fluminensis has green and white-striped leaves.