This endangered species is native to a small area in Georgia. These pics are from my recent trip to Plant Delights, and they show what a stunning plant this is. It is utterly unlike any other member of its genus, save perhaps B. perfoliata (which has somewhat similar foliage, but minus the striking silver color). In fact, I can't think of any plant normally grown in gardens, except for a bushy eucalyptus (which wouldn't survive in NY anyway) which gives quite the same effect.
To get this plant, or any other endangered species grown by any nursery, you most often have to go and pick it up yourself, since they apparently can't be shipped across state lines. Another example of a stupid federal rule, as the nurseries like PD and Woodlanders that propagate such species are doing us a major favor by helping to raise awareness about these species as well as to ensure their continued survival via propagation and growing in gardens. Note that this is not a substitute for conservation of the species in its native habitat, but it is extra insurance against extinction should such efforts fail, as well as the best way of making the preservation of endangered species a more tangible issue to people that can thus see and grow such plants.
I brought a plant of the Baptisia last year, and kept it in a pot for too long, then put it in the garden during the fall. It survived the harsh winter and came up, but then mysteriously died back. I dug up the root, and noted that the crown had some sort of a rot, but most of the thick roots looked okay. So I soaked it in a systemic fungicide for a couple of days, and cut off the roots to make cuttings of them. I planted them up in a pot and hope they will form buds. Several references indicate that Baptisia will grow from root cuttings, but I doubt many people have a lot of experience with this species. Meanwhile my second plant, purchased this year, is already in the garden.