STUDY ON THE DICHOGAMY OF JUGLANS MANDSHURICA MAXIM. Flexistyly and Its Evolutionary Ecological Significance Changes of Endogenous Polyamines in Leave and Buds of Dichogamous English Walnut (Juglans regia L. ) during Flower Bud Differentiation Flowering Characteristics and Breeding System in Camptotheca acuminata Decne Evidence of Dichogamy in Santalum album L. Pollination ecology and breeding system of Impatiens lateristachys(Balsaminaceae)endemic to China FLORAL SYNDROME AND BREEDING SYSTEM OF LOBELIA CHINENSIS, A PERENNIAL HERB WITH STAMEN FUSION Stamen movements in hermaphroditic flowers: diversity and adaptive significance Floral syndrome and insect pollination of the Qinghai-Tibet Plateau endemic Swertia przewalskii(Gentianaceae) Pollination ecology of Aconitum gymnandrum (Ranunculaceae) at two sites with different altitudes Studies on the Reproductive Characteristics of Cimicifuga nanchuanensis (Ranunculaceae), an Endemic Endangered Species to China Changes of Endogenous Polyamines in Leave and Buds of Dichogamous English Walnut (Juglans regia L. ) during Flower Bud Differentiation Pollination ecology of alpine herb Meconopsis integrifolia at different altitudes Breeding System of Protogynous Mandragora caulescens(Solanaceae)