Research on the Floral Syndrome and Breeding System of Medicinal Plant Corydalis decumbens

Corydalis decumbens located in natural populations in the campus of Anhui Normal University was detected and researched by out-crossing index,pollen-ovule ratio,pollen viability and artificial pollination during the field investigation on the florescence and floral characters,and discussed the floral dynamic and breeding system. The results showed: 1) Inflorescence of C. decumbens was raceme and flowering span of populations was about 46 d. The flowering span of a raceme and the life span of one single flower were about 7-11 d and 3-7 d.The plant was in bloom from March to April. 2) There were no obvious isolation between stigma and anthers. The pistil matured earlier than stamen. 3) A self-pollination breeding system can be shown by OCI = 3,and pollinators are partly required in outcross; P /O = 938,and the breeding system of Corydalis decumbens was mixed with selfpollination and outcrossing.