Caudices woody, fibrous-rooted. Stems erect to declined, puberulent. Leaves: petioles 8-30 mm; blades mostly 3-9 × 2-5.5 cm, bases truncate to cordate, margins crenate-serrate to serrate, faces minutely and sparsely puberulent. Corollas 3.5-4.5 mm. 2n = 20. Flowering Jul-Sep(-Oct). Limestone boulders, crevices, ridgetops, sandstone bluffs, pine woodlands, pine and fir with Douglas fir woods; 1700-2600(-2800) m; Ariz., N.Mex., Tex.; Mexico (Coahuila).