Floral sex allocation and flowering pattern in the andromonocious Soranthus meyeri (Apiaceae) Adaptive significances of sexual system in andromonoecious Capparis spinosa (Capparaceae) Pollen and Resource Limitation in Veratrum nigrum L. (Liliaceae), an Andromonoecious Herb A Preliminary Study on the Reproductive Features of Veratrum Nigrum L. Along an Altitudinal Gradient Study on the Breeding System of Aesculus chinensis Increased Maleness at Flowering Stage and Femaleness at Fruiting Stage with Size in an Andromonoecious Perennial, Veratrum nigrum An Examination of the Function of Male Flowers in an Andromonoecious Shrub Capparis spinosa Sex Expression and the Evolutionary Advantages of Male Flowers in an Andromonoecious Species, Sagittaria guyanensis subsp. lappula (Alismataceae)