Abstract: The new Iris ensata var. hortensis cultivar‘Shuishizi’was derived from the cross breeding of female parent I. ensata var. hortensis‘Hekighoku’and male parent I. ensata var. hortensis‘Tomozuru’. The plant height is 52.5-65.6 cm,the flower stem height is 63.4-72.7 cm,the leaf width is 2.1-2.3 cm,and the flower diameter is 18.6-21.8 cm. There are 2 flowers on a single flower stem,6F,with pink purple petals（RHS,N88B）,3-4 style,the style arms are pink purple（N88C）with pink purple（N81B）apexes,and the signal is yellow（9A）. The group flowering period is from mid-late May to mid-early June,with a single plant flowering period of about 7-10 days,and is not fruiting. The flower color of cultivar‘Shuishizi’is elegant and bright,the flowers are large,the petals have a strong drooping sensation,and the growth adaptability is strong. It can be promoted and planted nationwide.

Key words: Iris ensata var. hortensis, cultivar