Observations on flowering biological characteristics in 21 bamboo species within 6 genera have been made for more than 10 years in Anjie Bamboo Botanic Garden. The results were as follows:Some bamboo species formed blossom bud and flowered in the same year, some formed such bud in one year and flowered in the subsequent year. The blossom period of different bamboo species varied, which might be divided into two kinds, i. e. long blossom period and short blossom period.There was considerable variation in flo...