Abstract Orchid gynostemium, the fused organ of androecium and gynoecium, ovule development are unique developmental processes. Two DROOPING LEAF/CRABS CLAW (DL/CRC) genes, PeDL1 PeDL2, were identified from Phalaenopsis orchid genome functionally characterized. Phylogenetic analysis indicated that most recent common ancestor orchids contained duplicated DL/CRC-like genes. Temporal spatial expre...