Contact: Hilary Glover
Caption: Dahlia variabilis hort. is a popular garden flower. Continuous dahlia breeding worldwide has led to the availability of a huge number of cultivars - 20,000 varieties - many of them showing red hues. However, black hues of dahlia flowers occur rarely, in comparison.
Credit: Dr. Heidi Halbwirth
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Related news release: Le Rouge et le Noir: Where the black dahlia gets its color