achene (a dry fruit where the seed separates from the seed coat)
Stems
rhizomatous
Roots
fibrous
Dimensions
24-36 inches tall, up right mounding
Propagation
division, seeds
Cultivar Origin
"Charles Deam was the first to find it and he only found it in two places in Indiana. After 1916 he never was able to find it there again." (hortgardenstoday.blogspot.com)
Author's Notes
I see this growing in a shaded spot at the Chicago Botanic Gardens, every time I walk through the wooded wildflower area. The pictures are all from this place.