Photo: Asclepias asperula 2.

Closeup of flowers. Sierra Vista, AZ, US. Wild. 1998-05-01.

Asclepias asperula (Dcne.) Woods.
Engl.: antelope horns, spider milkweed, immortal, inmortal, spider antelope horns.
Bot. syn.: Acerates decumbens Decne., Asclepias decumbens (Nutt.) Dcne., Asclepiodora decumbens (Nutt.) Gray