Gardinier's penstemon

General: Plants from a branched, woody base, the several, erect stems 1-4 dm. tall, also with short, densely-leafy sterile stems which tend to form loose mats; herbage finely gray-puberulent, with a few stalked glands in the inflorescence.
Leaves: Leaves numerous, opposite to alternate, or irregularly scattered, entire, linear, seldom over 3 mm. wide.
Flowers: Inflorescence of several few-flowered verticillasters; calyx 3.5-8 mm. long, the 5 segments broadly lanceolate, entire; corolla.. more