Abstract:The flowering habit of Pleioblastus yixingensis was observed at first, and the inflorescence morphological structure was described. Genus Pleioblastus has 3 stamens according to the Flora Reipublicae Popularis Sinicae, but the number of stamens with 3, 4, 5 or 6 were observed during field investigation, of which 3 was the majority. These enriched the data of Pleioblastus. The boron was not necessary element during pollen germination. The pollen was stained aborted with germination rate only 5.11%, which was an important reason of low setting of P. yixingensis. Pleioblastus yixingensis in Henan, Jiangsu, Zhejiang, Anhui was synchronized flowering in 2017 with fruiting rate less than 10%.