Penstemon watsonii is a flowering plant that grows largely in Nevada, Utah, and Colorado.

[4] On Penstemon watsonii basal leaves, ones that sprout from the base of the plant, are absent or poorly developed.

[3] The funnel shaped flower is 12 to 18 mm long and may be blue to purple or violet in color with red-purple nectar guides.

In 1906 the botanist Edward Lee Greene described a species he named Penstemon phlogifolius that is now regarded as a heterotypic synonym of P.

[2] Penstemon watsonii grows in the central part of the Intermountain West of the United States.