These easy-to-grow perennials are prized for their attractive, delicate flowers. They're not particular about soil, but they do require good drainage.
T. calycinum (Phemeranthus calycinus). FAME FLOWER. Native from Missouri and Arkansas south to Mexico. In the wild, forms large colonies in rocky soils. Very narrow, succulent leaves to 2 in. long form basal foliage clumps to 1 ft. wide. Open clusters of pink to red, five-petaled flowers appear atop 8-in.-tall leafless stems. Flowers open in morning, close by midafternoon. Perfect for a rock garden.
T. paniculatum. JEWELS- OF-OPAR. Tender perennial, native from southern U.S. to Central America. A true Southern passalong plant, rarely purchased at garden centers but frequently showing up as an unannounced but welcome guest in gardens. Forms a low, 1- to 2-ft.-wide rosette of oval, pointed, bright green leaves to 3 in. long. In summer, thin stalks to 2 ft. tall carry large clusters of tiny pink flowers; these are followed by beadlike yellow seedpods that mature to a rich burgundy-red. Good in containers or at the front of the border. Reseeds readily. 'Limon' has chartreuse foliage. 'Variegatum' has grayish green leaves with white margins.