I have a lot of native species to trade for either/both of these species or asclepias purpurescens. I have Acelpias tuberosa, incarnata and syriaca. Also, many asters (novae-angliae, divaricatum, cordifolium, Ionactis linariifolius, Pityopsis falcata, Sericocarpus asteroides, many others). Ask if you have either of these species available. All are from coastal Connecticut.