Abstract: The pollen's shape and germination percentage and the bloom progress of five bamboo species were studied. The main results were as follows:The pollen's feature,which were observed by electron scanning microscope,was similar to that of grass family. The pollen with monopolar hole was spherical. The veins of the spore wall was fine or rough granular. Generally,the pollen germination percentage of bamboo was low and it was different between five bamboo species. The highest was 76.5% and the lowest was only 5.3%. The bloom progress showed all these bamboo species bloomed fast in the morning. All the results above provided the basic reference for studying the crossbreeding of the several bamboos and the research of carrying out controlled pollination.

Key words: bamboo flowering, pollen germination percentage, floral character