Great article to raise awareness of the possibility of extinction of the monarch, Dave. I had no idea there were that many types of milkweed. I had a nice patch of Asclepias tuberosa milkweed, but it has diminished over time. I need to revamp that area.
Some of my daylily friends are actually taking further steps by bringing the chrysalis inside to protect it until the butterfly hatches. They have really taken up the hobby and the cause to help the monarch.