Pollination biology of Alpinia hainanensis (Zingiberaceae) Autonomous Selfpollination under Dominant Flexistylous Outcorssing Mechanism in Alpinia galanga (Zingiberaceae) A PRELIMINARY STUDY OF THE POLLINATION BIOLOGY OF ALPINIA OXYPHYLLA Flexistyly and Its Evolutionary Ecological Significance Study on the Flexistyly Pollination Mechanism in Alpinia Plants (Zingiberaceae) Maintenance and functional gender specialization of flexistyly Autonomous Selfpollination under Dominant Flexistylous Outcorssing Mechanism in Alpinia galanga (Zingiberaceae)