Flowering Characteristics and Diversity of Floral Visitors of Ammopiptanthus mongolicus

The flowering dynamics,pollen-ovule ratio,pollen viability,pistil receptivity,species of floral visitors on Ammopiptanthus mongolicus,as well as visitors' behavior and frequency were studied in the field of Wuhai city,Inner Mongolia.The main results were as follows: The flowers of A.mongolicus were 5 d in duration,their P/O was(1 190±125),pollen viability was 4~5 d,and pistil receptivity was 3 d.Their natural fruit set was 30%~35%.Insects among Hymenoptera,Diptera,Coleoptera and Lepidoptera,especially Anthophora spp.,Hoplitis sp.and Chalicodoma sp.were the most common visitors.