Based on the floral quartet model of flower development, the class A genes HmAP1-2 and HmAP2-5 were hypothesized to be the key genes regulating the development of decorative flower sepals according to the expression pattern and co-expression network, and there was a certain regulatory relationship between them.Based on the tetramer model of flower development, according to the expression pattern and co-expression network, it is speculated that class A genes HmAP1-2 and HmAP2-5 are the key genes to regulate the development of decorative calyx slices, and there is a certain regulatory relationship between them.