Zephyranthes is a tropical wildflower best known by the name Rain Lilies, which was given due to their tendency to bloom after a hard rainfall. These petite charmers are perfect for filling in bare garden spaces, as they gently naturalize and weave through established plants. The Crocus-like flowers, which arrive in various bright shades, require minimal care to stay stunning from late summer into early fall. Tufts of outward-spreading, narrow, grass-like, green leaves surround the flowers for an irresistibly lush display.