Rotheca serrata, commonly known as the blue fountain bush, the blue-flowered glory tree or the beetle killer, is a species of flowering plants in the family Lamiaceae.

[2] The flowers are showy and develop in cymes which are covered with short, soft erect hairs.

The individual flowers are small and form part of an erect pyramidal panicle up to 10 in (25 cm) long.

The corolla of each flower is blue, cylindrical, hairless outside and hairy inside and the stamens arch out from it.

[4][5] Rotheca serrata is native to eastern India, Sri Lanka and Malaysia and is found in forests.