Pollination ecology of rare and endangered species Kmeria septentrionalis Content of Endogenous Phytohormones and Isoenzymes of Peroxidase in Male and Female Pistacia chinensis Plants Bunge Leaves The Female Plant of Horikawaella rotundifolia C. Gao et Y.J. Yi (Jungermanniaceae, Hepaticae) Sex identification of Siraidia grosvenorii by isozyme analysis An Improved Variety for Samara and Medicinal Use:Eucommia ulmoides ‘Huazhong 2’