Comparison of floral patterns in wild and cultivated camellias. A, wild C. japonica was singe-flower with canonical floral structures. B, double-flower cultivar `Jinpanlizhi’ displayed distinctive shapes between outer and inner petals. Right upper panel of B displayed the outer petals from outside to inside; Right bottom panel showed the inner organs including inner petals, stamens, carpels, and stamenoid petals. C, double-flower cultivar `Shibaxueshi’ was a typical formal double type with gradient petals from outer layer to the inside. The stamen and carpel were missing. D, E, upper and lower epidermal cells from wt; F, G, upper and lower epidermal cells from `Jinpanlizhi’; H, I, upper and lower epidermal cells from `Jinpanlizhi’. White squares indicated the areas used for SEM analysis, and 1 and 2 were referring to F, G and H, I respectively.