Callirhoe and Dischidia are both genus of plants and one is known as poppy mallows, which?
Dischidia Dischidia is a genus of plants in the Milkweed family, Apocynaceae. They are epiphytes native to tropical areas of China, India and most areas of Indo-China. "Dischidia" are closely aligned with the sister genus "Hoya". Unlike "Hoya", the genus "Dischidia" is poorly known and has not been studied as closely.
Catharanthus Catharanthus is a genus of flowering plants in the dogbane family, Apocynaceae. Like genus "Vinca", they are known commonly as periwinkles. There are eight known species. Seven are endemic to Madagascar, though one, "C. roseus", is widely naturalized around the world. The eighth species, "C. pusillus", is native to India and Sri Lanka. The name "Catharanthus" comes from the Greek for "pure flower".