Studies on Original Plant of Traditional Chinese Drug "Bai Zhi" (Radix Angelicae Dahuricae)and Its Closely Related Wild Plants Ⅲ.Comparson of Coumarins of"Bai Zhi"with Those of Closely Related Wild Plants Evaluation Index System of Endangered Levels of the Wild Plants with Tiny Population in China Studies on Original Plant of Traditional Chinese Drug "Bai Zhi" (Radix Angelicae Dahuricae)and Its Closely Related Wild Plants Ⅳ.Discussion on Original Plant and Cultivation History of Traditional Chinese Drug "Bai Zhi" and Evolution A Comparison of National Key Protected Wild Vascular Plants in SE Yunnan and NW Yunnan Effects of soil factors on arbuscular mycorrhizae (AM) fungi around roots of wild plants Asymbiotic Seed Germination and in vitro Seedling Rapid Development of Paphiopedilum spicerianum Discussion about range of nationalkey-protected wild medicinal materials Resource and Floristic Characteristics of the Key Protection Wild Plants in Shanxi Studies on Original Plant of Traditional Chinese Drug "Bai Zhi"(Radix Angelicae Dahuricae)and Its Closely Related Wild Plants Ⅱ.Karyological and Pollen Morphological Studies on "Bai Zhi" and Closely Related Wild Plants Studies on Original Plant of Traditional Chinese Drug "Bai Zhi"(Radix Angelicae Dahuricae ) and Its Closely Related Wild Plants Ⅰ. Morphological and Anatomical Studies on "Bai Zhi" and Closely Re lated Wild Plants Asymbiotic Seed Germination and in vitro Seedling Rapid Development of Paphiopedilum spicerianum