Radiosensitivity of Green Globular Bodies of Matteuccia struthiopteris Exposed to 60Coγ Radiation Studies on chemical constituents in rhizome of Matteuccia struthiopteris Cytological Observations on 25 Species of Chinese Ferns Studies on chemical constituents of rhizome of Matteuccia struthiopteris Pharmacognostical Studies on the Chinese Drug Guanzhong Produced in Middle-South China Study on terpenoids from aerial parts of Matteuccia struthiopteris Development of Embryo in Matteuccia struthiopteris(L.) Todaro