Induction and anatomical observation of callus of Asarum heterotropoides Seasonal Changes of Caloric Values in Different Organs of Butia capitata Establishment and Optimization of High-frequency Shoot Regeneration System of Ligusticum chuanxiong Hort. ANATOMICAL VARIATIONS IN LEAVES OF BOESENBERGIA O. KUNTZE AND KAEMPFERIA L. SPECIES (ZINGIBERACEAE) In vitro Culture and Plant Regenera tion of Pa rthenoc issus qu inquefolia