The ornamental value of C. faberi is determined by many factors, especially the novel flower color, shape and fragrance. Floral zygomorphy have evolved multiple times from radially symmetrical (actinomorphic; polysymmetric) ancestors in different angiosperm lineages (Endress 1999; Stebbins 1974). The mechanism of TCP model for bilateral flower symmetry has been well established in model species, such as snapdragon (A. majus), Lotus japonicus and rice (Luo et al. 1996; Feng et al. 2006; Yuan et al. 2009). In A. majus, CYC and DICH control the dorsoventral asymmetry (Luo et al. 1999). In L. japonicus, floral dorsoventral asymmetry is regulated by three LjCYC genes (LjCYC1, LjCYC2, LjCYC3), especially the LjCYC2. In monocot, RETARDED PALEA1 (REP1) controls palea development and floral zygomorphy in rice, whose flower is different from that of A. majus or L. japonicus. In our C. faberi transcriptome data, we identified 35 TCP genes, of which 10 CIN-like genes and one PCF-like gene showed significantly higher expression levels in the vegetative buds compared to the flower buds. qRT-PCR analysis revealed that the expression level of BRC2 was higher in the flower buds than the vegetative buds (Fig. 8e), suggesting that it might play important role in the regulation of floral zygomorphy of C. faberi.