Erythranthe dentata, commonly known as Coastal Monkeyflower or Toothleaf Monkeyflower, is a rhizomatous perennial herb that is native to moist meadows, streambanks, and coastal bluffs along the western coast of North America, from British Columbia to northern California. It typically grows to about 16 inches tall and features hairy stems with oppositely arranged, veined oval leaves up to 2.8 inches long. The plant is known for its showy, funnel-shaped yellow flowers, which are divided into two lobes on the upper lip and three on the lower, each flower reaching up to 1.6 inches in length and blooming in the late spring to early summer.

Coastal Monkeyflower is valued for its vibrant yellow flowers and ability to thrive in moist, well-drained soils. It is often used in native plant gardens, riparian restoration projects, and as a border plant in areas with adequate moisture. It prefers part shade to full sun and requires regular watering, especially when grown outside of its natural riparian habitat. While generally low-maintenance, it can be susceptible to powdery mildew and should not be overwatered to prevent root rot. This species is not known to be invasive and is a beneficial addition to gardens aiming to support native flora and fauna.CC BY-SA 4.0