Morphology and Germination Features of Achenes of 12 Species of the Genus Saussurea (Asteraceae) in Western Sichuan Plateau Karyological studies on two species of Compositae from the Hengduan Mountains, SW China Study on in vitro mucosal permeation properties and factors affecting mucosal permeability of paeonol Effects of elevated CO2 on the root growth and nutrient uptake in tomato (Lycopersicon esculentum Mill.) plants under different P application status Study on in vitro mucosal permeation properties and factors affecting mucosal permeability of paeonol tudy on physicochemical properties and influence factors on stability of breviscapine Optimization of SRAP-PCR System for Opisthopappus taihangensis(Ling) Shih by Uniform Design Effect of Adjustment for Inorganic Salt Contents on Adventitious Buds Proliferation and Growth of Opisthopappus taihangensis in vitro Comparing Impact of Two Selecting Variables Methods on Canopy Closure Estimation. ITS Sequence Analysis of Opisthopappus taihangensis and O. longilobus