Funastrum cynanchoides var. hartwegii
Synonyms: Funastrum cynanchoides subsp. heterophyllum; Philibertella hartwegii; Philibertia heterophylla; Sarcostemma cynanchoides subsp. hartwegii
Climbing milkweed as seen climbing into vegetation and onto granitic boulders in the desert wash of Hornblend Canyon, located on the west side of Highway S-2 at about MP 26.1, Anza-Borrego Desert State Park..........March 30, 2010.