Honestly, I had no intention to write another post so soon, but plants need to be shown at their best moments. And, Amsonia hubrichtii, the Arkansas bluestar is absolutely radiant right now.
Depending how much sun receives it may also take a russet hue (notice the capsules).
I won’t wonder again about why is not cultivated more; the images speak for themselves. It is a foliage plant by definition, the thread- like leaves will combine beautifully with almost anything else; those who want more flowery display should plant other perennials close to it and let them complement/weave through the delicate foliage.
The seeds are quite particular, like of other Amsonias (Fam. Apocynaceae); the fruits (capsules) can be spotted in one image above.
PS. It is a bit late to emerge in the spring; planting a bunch of small spring bulbs & daffodils close to the clump will do the trick ;)