The stems are red-purple and wiry with narrow leaves. Numerous deep purple, flat flower heads occur from July through September. These blooms occur in July to late August. Culver's root is infrequently found in northwestern parts of Iowa but is common elsewhere. It prefers full to partial sun and reaches heights of 3 to 7 feet.
Leaves are spear-like and whorled around the stem.
As you travel across Iowa on various vacations and trips this summer, enjoy the many plantings of native grasses and wildflowers along the state's roadways. Iowa State University , Ames, Iowa. This information subject to a usage policy .