An Analysis of Age Structure and the Strategy for Asexual Propagation of Aneurolepidium chinense Population Determination of Total Alkaloid in Seedling Bulbs of Fritillaria thunbergii Miq. Studies on Seeding and Cutting Propagating of Clematis canescens,An Endangered Wild Plant Influences of artificial disturbing degrees on soil conditions and liquorice roots system Preliminary study on mating system of Villosiclava virens Study on Numerical Taxonomy of the Asexual Propagation of Scirpus planiculmis in Songliao Ecological Area Regeneration mode of Xanthoceras sorbifolia population and its contribution to population regeneration.  Gene shiva-1 Inheritance and Expression of Transgenic Paulownia Spore Culture and Propagation of Platycerium wallichii Spore Propagation and Rejuvenation of Sphaeropteris lepifera Spore Propagation and Rejuvenation of Sphaeropteris lepifera