What is "ruellia tuberosa"

Snapdragon \Snap"drag`on\, n.

1. (Bot.)

   1. Any plant of the scrrophulariaceous genus Antirrhinum, especially the cultivated A. majus, whose showy flowers are fancifully likened to the face of a dragon.

   2. A West Indian herb ( Ruellia tuberosa) with curiously shaped blue flowers.

2. A play in which raisins are snatched from a vessel containing burning brandy, and eaten; also, that which is so eaten. See Flapdragon.
   --Swift.

Ruellia tuberosa, also known as minnieroot, fever root, snapdragon root and sheep potato , 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.

Some butterfly species, like the lemon pansy ( Junonia lemonias) and the mangrove buckeye ( Junonia genoveva), feed on the leaves of Ruellia tuberosa.