Are Thunbergia and Boltonia in the same family?
Thunbergia Thunbergia is a genus of flowering plants in the family Acanthaceae, native to tropical regions of Africa, Madagascar and southern Asia. "Thunbergia" species are vigorous annual or perennial vines and shrubs growing to 2-8 m tall. The generic name honours Carl Peter Thunberg.
Elatinaceae Elatinaceae is a family of flowering plants with ca 35 (to perhaps 50) species in two genera: "Elatine" and "Bergia". The "Elatine" are mostly aquatic herbs, and the "Bergia" are subshrubs to shrubs. "Elatine" species are widely distributed throughout the world from temperate to tropical zones, with its greatest diversity found in temperate zones. "Bergia" is found in temperate to tropical Eurasia and Africa, with two tropical and one tropical to temperate species in the Americas. The center for biodiversity of "Bergia" is the Old World tropics, and this is also the center for biodiversity for the family. Neither genus is found in arctic ecosystems.