Penstemon rydbergii

From Calscape:

Rydberg’s Penstemon (Penstemon rydbergii) is a native perennial herb … It is moderately fast growing and moderately long-lived. It grows in an upright form to a height of 3 feet, with active growth during the spring. Flowers are blue and striking, and bloom in the mid summer. Leaves are medium green and deciduous. It tends to grow in moist meadows and streambanks, at elevations from 3,900-10,200 feet.