Research on life history and phenological period of wild-stimulated cultivated Gastrodia elata f. elata in Guizhou Gastrodia gracilis,a Newly Recorded Species of Gastrodia from Mainland,China Content of mineral elements of Gastrodia elata by principal components analysis Research on variable-temperature drying process of Zhaotong Gastrodia elata Bl. f. glauca S. Chow THE DETERMINATION AND SIGNIFICANCE OF ACCUMULATED TEMPERATURE ON GASTRODIA ELATA BL. PERIOD BIOLOGY Study on the Optimum Harvest Period of Different Varieties Gastrodiae elata Bl.GAP Cultivation Habitat in Hubei Province Effects of different cultivation measures on phenophase and capsule of two varieties of Gastrodia elata Studies on Chemical Constituents of Effective Part of Gastrodia elata