Flower size variation at the inflorescence and individual levels and its trade-off with flower number in Polygonum hydropiper(Polygonaceae) Characteristics of leaf carbon, nitrogen and phosphorus stoichiometry in relation to plant size of Machilus pauhoi. Male Flowers and Relationship between Plant Size and Sex Expression in Herbaria of Nomocharis Species (Liliaceae) Plant size differences with twig and leaf traits of Zygophyllum xanthoxylum in the northern slope of Qilian Mountains, China