Clump-forming plants to about 112 ft. tall (in bloom) and 1122 ft. wide; spread by rhizomes (and by aboveground runners, in the case of T. cordifolia). Leaves arise directly from rhizomes; they are evergreen but may change color in autumn. Selections with year-round colorful foliage are popular; look for new intro- ductions in addition to those described below. Narrow, erect flower stems carry many small white or pink flowers. Useful in shady rock gardens; make pretty ground covers but will not bear foot traffic. Deer resistant.
T. cordifolia. FOAMFLOWER. Rapid spreader from eastern North America. Light green, lobed, 4-in. leaves show red and yellow fall color. Creamy white flowers on foot-tall stalks. Leaves of 'Eco Red Heart' have dark red centers and veins; those of 'Oakleaf' are deeply lobed. Both selections have pink blossoms.
T. selections and hybrids. Many of the choicest foamflowers are of uncertain origin.
'Butterfly Wings'. Light green leaves have centers heavily splashed with purplish black. Light pink flowers.
'Crow Feather'. Deeply cut, bright green leaves with dark veins. Leaves color up well in winter in shades of pink, red, and darkest purple. Light pink flowers.
'Cygnet'. Star-shaped leaves with purple markings along the veins. White flowers open from pink buds.
'Happy Trails'. Round-lobed leaves are medium green with deep brown veins. Trailing habit; nice choice for spilling over container edges. Short white flowers.
'Mint Chocolate'. Deeply lobed leaves have a central zone of deep brownish purple. Pinkish white flowers.
'Neon Lights'. Large, deeply cut leaves are bright green with a burgundy central zone. Pale pink flowers.
'Ninja'. Deeply cut leaves are marbled with blackish purple, turning almost entirely purple in winter. Pinkish white blooms.
'Pink Skyrocket. Deeply cut green leaves have deep red veins. Profuse show of large pink flowers.
'Skeleton Key'. Very deeply cut leaves with deep purple midrib. White blossoms.
'Spring Symphony'. Green leaves with a central black blotch; pink flowers. Tolerates heat and humidity.
'Sugar and Spice'. Glossy, bright green leaves are deeply cut and heavily marked with maroon. White flowers open from pink buds.
T. wherryi. From southeastern U.S. Like T. cordifolia but lacks aboveground runners, is slower to spread. Flower clusters are somewhat more slender, often tinged pink. 'Heronswood Mist' has leaves heavily marbled and blotched with creamy white; pink stems hold light pink flowers.