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 0.6–1.5 m (24–59 in) 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.

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