Photo: Asclepias tuberosa 2.

Flowering plant. Lake Maclellan, TX, US. Wild. 1998-06-01.

Asclepias tuberosa L.
Engl.: butterfly milkweed, pleurisy root, butterfly weed, chigger weed, flux-root, orange swallowwort, swallow-wort, tuber root, white root, wind root.
Deu.: Knollige Seidenpflanze.
Suom.: karvasilkkiyrtti.
Sven.: orange sidenört.
Bot. syn.: Asclepias decumbens L.