In between Symphytum and Bolax which one is endemic to temperate South America?
Symphytum Symphytum is a genus of flowering plants in the family Boraginaceae. Its species are known by the common name comfrey. There are up to 35 known species. Some species and hybrids, particularly "S. officinale" and "S." × "uplandicum", are used in gardening and herbal medicine.
Spongiosperma Spongiosperma is a genus of plant in family Apocynaceae first described as a genus in 1988. It is native to the South America, nations of Venezuela, Colombia, and Brazil.