number : 1 tot 3 per m2
- alone or in small tuft (A) - groups of 10 to 20 plants, even more (C)
Plant description
A genus from the family of Butterfly flowers. Very strong N-American plants that are very drought resistant.
The plants need several years to grow into an adult specimen, but thanks to their beautiful flower and graceful pods, they are certainly an asset to the (prairie) garden.