Abstract: 【Objective】 The inflorescence plays an important role in taxonomy and propagation in bamboo plants. Its morphological characteristic is one of the bases for bamboo classification. However, the specialized flowering characteristics, long vegetative period and short reproductive period in bamboo have greatly limited research on its reproductive biology. At present, there is little research data available on bamboo flower bud differentiation and inflorescence types. The study therefore aimed to clarify types of bamboo inflorescence and the development processes. 【Method】 We used Bambusa oldhamii ‘Xia Zao’ ZSX, Sasaella kongosanensis ‘Aureostriatus’ and Pleioblastus pygmaeus as our samples in order to study the establishment process of the inflorescence in detail, employing paraffin sections and morphological observation as our methodology. 【Result】 These three bamboo varieties all have mixed inflorescences, with a varied external inflorescence morphology: the spikelet development on the inflorescence spindle was a definite inflorescence, while the floret development on the spikelet was indefinite. The top spikelet first developed on one inflorescence, followed by the second spikelet primordia at the base of the top spikelet, and so on, in a similar fashion, while the floret on a different part of the same spikelet developed from the base to the top. 【Conclusion】 Based on the spikelet and floret development, we combined the formerly determinate inflorescences(S. kongosanensis ‘Aureostriatus’ and P. pygmaeus)and the formerly indeterminate inflorescence(B. oldhamii ‘Xia Zao’ ZSX)into a single type of mixed inflorescence.