The Collaborative International Dictionary
Heterochromous
Heterochromous \Het`er*o*chro"mous\ (?; 277), a. [Hetero- + Gr. ? color.] (Bot.) Having the central florets of a flower head of a different color from those of the circumference.
Wiktionary
heterochromous
a. (context botany English) Having the central florets of a flower head of a different colour from those of the circumference.