Wake Robin, or Trillium, a species of spring-flowering, tuberous herbs of the lily family. Erect stems, three-leaved near the flower. The flower has three green, spreading sepals and three white or colored petals, six stamens, and a three-celled pod illustrating well the plan of three in its make-up. The name is derived from the fact that they are in bloom to greet the robin shortly after his spring arrival. There are several species, all woodland flowers. Trilliums vary in size. A large form, with white to pink flowers and curved petals two to three inches long, is found from Canada to Florida, and westward to the plains. The largest of all, with purple to white petals four inches long, is found on the Pacific coast. The smallest is a dwarf three to five inches high, found from Minnesota to Pennsylvania and Kentucky. Purple trilliums are found from Idaho to Oregon and from Georgia to Alabama and Arkansas.