B.Rubella 'Incan Red Flame' (USDA 9a) has been grown from seed as B.sanguinea X arborea and shows similarities to a german cultivated Rubella ( Sanguinea X arborea) called 'red flame'. Rubella is a cross between Sanguinea and Arborea so the flower does have a beautiful mild scent. The flower is a yellow and deep red bulging tubular corolla, with lovely mild scent and flowers are 20cm long. Cold variety flowers from January to May and in the autumn in mild areas.
B.Rubella 'Incan Red Flame' (USDA 9a)