Figure 1 From:'Le Rouge et le Noir': A decline in flavone formation correlates with the rare color of black dahlia (Dahlia variabilishort.) flowers Examples of black dahlia cultivars. A: cv. Karma Choc,B: cv. Tisa,C: cv. Arabian Night,D: cv. Kenora Macop B. Photos of other cultivars can be found e.g. in the dahlia catalog athttp://www.dahlie.net/orhttp://www.dahlienwirth.at/dahliensorten.html. Back to article page