Asclepias Species ID

I ordered Butternut seed a bit back and had a rider along.... Some kind of Milkweed that offered itself up in the nut pot.... So now I am wondering if anyone can ID this... No luck online... Thanks Cat

 

Mainly from the leaves and loose flower arrangement, I think it might be an all yellow A. curassavica
http://www.floridagardener.com/pom/Milkweed.htm

 

Thanks
That is it... The leaves are a match. As are the flowers.... I sent the website to the man I bought the Butternut seed from! Cat