[1][2][3][4][5] It is native to western North America from British Columbia to the Klamath Mountains of far northern California, where it grows in moist and wet wooded habitat, such as moss beds and rocky stream banks.

[6][7] Erythranthe alsinoides is an annual herb producing an erect stem up to about 15 centimeters tall.

Less than 2 centimeters long with 3 to 5 prominent veins on the upper surface, they are oppositely arranged about the small stem.

The base of the flower is surrounded by a slightly hairy red calyx of sepals.

The yellow corolla of the flower has two lobes on its upper lip and three on its lower.