[1][2][3][4] It is endemic to San Bernardino County, California, where it is known only from the Mojave Desert.

[5] The population sizes and abundance vary, as they probably depend on annual rainfall amounts.

[6] Diplacus mohavensis is a small, hairy annual herb growing at ground level or erect to a maximum height near 10 centimeters.

The oppositely arranged leaves are narrow oval in shape and under 3 centimeters in length.

The tubular base of the tiny flower is encapsulated in a hairy, ribbed calyx of red sepals with pointed lobes.