It is endemic to a small part of the Pacific Northwest of North America.

[1][2][3] This species is a perennial herb[3] or shrub[2] growing 20 to 40 centimeters tall.

The oppositely arranged, blue-green leaves are stiff and leathery and have smooth or slightly serrated edges.

[2] Penstemon barrettiae generally grows on cliffs and rock outcrops where the soil is thin.

Threats to the species include poaching, road maintenance, herbicides, quarrying, logging, and recreational activity.