Antirrhinum cyathiferum), a New World snapdragon known by the common names dog's-mouth[2] and Deep Canyon snapdragon.

It is native to the deserts of northern Mexico and adjacent California and Arizona.

It is an annual herb producing a hairy, erect, non-climbing stem with many oval-shaped leaves.

The solitary flowers are dark-veined deep purple and white, often with some yellow in the throat, and are about a centimeter long.

Previously considered to belong among the New World Antirrhinum species, it is now considered the sole member of the related genus Pseudorontium.