[Investigation on growth and development of Tussilago farfara L. in Beijing].

OBJECTIVE: To provide a scientific basis for the introduction and harvest of T. farfara in Beijing. METHOD: Random sampling in late growing period. RESULT: T. farfara reached the peak of vegetation growth in early September and concurrently began its reproductive growth. During this period its bud and rhizome began to form and develop and kept growing until the period of freezing weather. CONCLUSION: There are two optimum the times for reaping T. farara bud: one is around the fifteenth day before the period of freezing weather, and the other is around the tenth day after the thawing season in the next year.