Brewer's monkey flower is a small annual to 18 cm tall. The herbage is abundantly glandular. The stems are slender and simple to sometimes branched. The leaves are long and thin and linear in shape and range from 1-2 cm long and 1-4 mm wide.
The calyx is 3-6 mm long with 5 teeth of roughly equal size. The corolla is lavender to violet, sometimes marked with yellow. The corolla is 5-10 mm long and barely 2 mm wide at the throat. The lobes are similar but not identical, and the flower is slightly two lipped. Each lobe may have a short notch at the tip as seen in the upper photo.Habitat:
Brewer's monkey flower is found in moist areas near streams, seep areas, or on moist forest slopes or rocky cliffs.
Brewer's monkey flower may be found from southern British Columbia, south along the eastern edge of the Cascade Mts to southeast California, east to western Montana, and south to Utah and Nevada.