Crotalaria spectabilis, the showy rattlebox or showy rattlepod, is a species of flowering plant in the pea family Fabaceae. It is native to the Indian Subcontinent, southern China, and Southeast Asia. It is a perennial herb that grows up to tall. It grows in montane grasslands, along forest edges, and within meadows. It was introduced (originally as a green manure) to most of the world´s tropics and subtropics and is now a serious agricultural pest species. It is toxic to livestock, causing liver damage.

Ecology: Crotalaria spectabilis is insect pollinated and is recorded to have been visited in northern Florida by Lasioglossum apopkense.