水竹叶属（学名：Murdannia）是鸭跖草科下的一个属，为草本植物。该属共有约50种，分布于东半球的热带、亚热带地区。

Murdannia is a genus of annual or perennial monocotyledonous flowering plants in the dayflower family.

The genus is one of the largest in the family. They are most easily distinguished from other genera in the family by their three-lobed or spear-shaped antherodes (i.e. non-functional anthers). Also, along with the closely related genus Anthericopsis, it is the only genus with staminodes (i.e. non-functional stamens) opposite the petals.