Zephyranthes candida is a native of South America which has naturalized as far north as North Carolina. White, daisy like flowers emerge in August from 1-foot tall narrow straps of dark green foliage. True to its common name, it often blooms right after a good rain storm. It thrives in moist, well-drained soil and likes sun to part-shade.  If there is no space in the garden, it works well as a container plant.