Russelia equisetiformis, the fountainbush, firecracker plant, coral plant, coral fountain, coralblow, ruby falls or fountain plant, is a species of flowering plant in the family Plantaginaceae.

This weeping subshrub is native to Mexico and Guatemala.

The Latin specific epithet equisetiformis implies the plant has a form "like/similar to Equisetum"—i.e., 'horsetail', 'horsetail rush/fern'—a genus which Russelia is only distantly related to (and which is not a true fern genera).