Abstract: Optical microscopic study shows that there exists a significant difference of floral structure between G. soja and G. max. For G. soja. its papilionaceous flower has two separated dragonbone petals, and tubular calyx has no organizational differentiation in anatomic structure. But for G. max, its two dragonbone petals are fully united, calyx consists of epidermis and unreg ular parenchymal cells, and small degenerated vascular bundles are distributed uniformly between parenchymal ce1ls,. It is suggested that the Glycine with highly evolutionary and symmetric papilionaceous flowers still maintains the structural character of its original flowers.

Key words: Glycine sofa, Glycine max, Dragonbone petal, Vascular plant, Evolutionary morphology, eco-innovation, institutional theory, financial performance, environmental performance