A. Tuberosa.
Alice, we may be looking at a location thing here with the "spreading look", "upright" thing. I have 2 and while they were both originally looking like upright versions, they are now more of a spreading version. You & I are both way south while Jeanie is in MN. I got mine from Santa Rosa in little 4" pots last fall & they took off gangbusters to where I raised 30 some odd monarch cats on them this year & didn't run out of leaves! Mine make seed pods like mad!
Milkweed is notorious for aphids as well as milkweed bugs.
