Abstract: This paper studied on the floral syndrome , species of visiting insects and their foraging behavior of Kmeria septentrionalis. The results showed that the top of corolla of Kmeria septentrionalis was half open , and there were spaces between tepals, only the insects that could go through the space were able to get to the flowers inside to collect pollens or pollinate for them . The tepals of male flowers and female flowers were cut off to show their stamens and stigmas completely before rainning, and other male flowers and female flowers were chose for comparison. After rainning, the pollen viability of male flowers was tested and pollens on stigmas of female flowers were counted . The results showed that the bloom pattern of Kmeria septentrionalis performed the function of protecting. It made pollens on male flowers refrain from being soaked by rainwater, and reserved pollens on stigmas of female flowers . This floral constructure was of ecological adaptability to continuous
raining at flowering time . Species of visiting insects of male flowers was double as that of female flowers. For insects, male flowers were more attractive than female flowers .

Key words: Kmeria septentrionalis