External supports affect the photosynthetic characteristics and biomass allocation of the climbing plant Humulus scandens Humulus scandens gender differences in response to water stress in the vegetative growth stage Identification of Sex Related SRAP Molecular Marker in Humulus scandens Comparative Anatomy of Vessel Elements in Staminate and PistillatePlants of Fraxinus pennsylvanica Comparison of reproduction ecology of different Ficus awkeotsang strains Progress in Study on Sexual Differences of Woody Dioecious Plants