Ruellia tuberosa, also known as minnieroot,[3] fever root, snapdragon root and sheep potato (Thai: ต้อยติ่ง), is a species of flowering plant in the family Acanthaceae.

Its native range is in Central America but it has become naturalized in Africa (Tanzania in particular), South and Southeast Asia.

It is a small biennial plant with thick fusiform tuberous roots and striking funnel-shaped violet-colored flowers.

Some of the names of the plant such as popping pod, duppy gun and cracker plant come from the fact that children like to play with the dry pods that pop when rubbed with spit or water.

It grows, however, preferably in grasslands and roadsides—often as a weed in cultivated fields, and also in xerophile and ruderal habitats.