This is a deeply beautiful little perennial. I was fortunate enough to see it during its brief period of bloom at the Missouri Botanical Garden in Saint Louis in spring, 2004.
The flowers are single, bell-shaped and open erect or nodding. The flowers are followed by plume-like seedheads in spherical clusters that resemble those on some Clematis. The foliage is attractive throughout the growing season.
In that garden it was planted in gritty well-drained soil in the rock garden. Excellent drainage is a prerequisite to this plants survival. It also prefers cool climates but will tolerate warmer ones. In warm climates it is advantageous to give the plant shade from noon until 4PM during the heat of summer. In these hotter climates the plant also needs consistent moisture… it does not appreciate drought.

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