块根芦莉草（学名：Ruellia tuberosa），又名块茎芦莉草、消渴草，为爵床科卢利草属下的一个种。原产于热带美洲。

「消渴」一词源于素问奇病论，病证名。引入初期取其属名音译「芦莉」，而有蓝芦莉，块根芦莉等名称。

Ruellia tuberosa, also known as minnieroot, fever root, snapdragon root and sheep potato (Thai:ต้อยติ่ง), is a species of flowering plant in the Acanthaceae family. Its native range is in Central America but presently it has become naturalized in many countries of tropical South and Southeast Asia.