Assessment of vulnerability of ecological water resource bank in hilly-land regions, South China: a case study of Hunan Province Additions to the fern flora of Hunan Province SOME NEWLY RECORDED PLANTS FROM HUNAN PROVINCE OF CHINA (Ⅴ) A NEW SPECIES OF CYRTOMIUM FROM HUNAN STUDIESON DOLICHOS LABLAB L. RESOURCES IN HUNAN PROVINCE A Preliminary Study on the Spermatophytic Flora of Longshan Forest Park in Lianyuan of Hunan Province Studies on fertility characteristics of different productive paddy soils in double-rice copping regions of Hunan province Reasons of Damage of Forest by the Ice and Snow,the Loss Evaluation as well as Suggestions on Reestablish ment of Forests after the Disaster in Hunan Province Effects of Land Use Types on Soil Quality of the Hilly Area in Central Hunan Province Investigation and Analysis of Wild Ground Cover Plants Resources in the Xinning County of Hunan Province Understory Vegetation Biomass in Successive Rotations of Different Aged Cunninghamia lanceolata Forests Biodiversity of Wild Woody Vine Resources in Yunshan,Hunan