What is "oxypetalum"

Oxypetalum is a genus of flowering plants in the Apocynaceae family, first described with this name in 1810. The genus is native to South America.

Oxypetalum coeruleum is cultivated as an ornamental.

moved to other genera ( Calostigma, Cynanchum, Gothofreda, Morrenia, Philibertia, Tassadia, Tweedia)