Dear all, I recently read a french article on the tree dahlia, which states that D imperialis and D arborescens are two sepârate species (I allways assumed that they are synonymous). The article states : D arborea (syn D excelsia): 4-6 m high (15-20ft) colour "pale purple" D. imperialis: 2-3 high colour very pale, with pink towards the center. Can anyone confirm whether this statement is correct. I cannot find any useful reference with Google on this species (The species I have here is 4-6 m high with pale pink flowers.) Look forward to any opinion on the matter Greetings -- Lauw de Jager Bulb'Argence South of France (zone 9 (olive trees) emailto: dejager@bulbargence.com Site http://www.bulbargence.com/