It is closely related to Datura, belonging to the same nightshade family, solanaceae. Brugmansia blooms dangle like great trumpets or bells while Datura blooms stand erect.
This is a beautiful vine with bluish green attractive arrow-shaped, glaucous leaves, and bearing superbly beautiful, large, bell-shaped flowers, approximately 7cm/3 in long and 5cm/2 in wide.