Bot. Voy. Sulphur, 9, plate 5. 1844.
Subshrubs or small shrubs, to 1 m. Leaf-blades linear to narrowly elliptic or narrowly lanceolate or narrowly ovate to elliptic or ovate, larger blades 2.5–4 × 0.3–2 cm, surfaces glabrous or abaxial surface with scattered hairs proximally on midrib, usually bearing 2 glands proximally on margin above base. Inflorescences 5–18 cm, 4–13-flowered. Pedicels usually sessile, rarely raised on peduncles to 3.5 mm, much shorter than pedicels. Flowers: posterior petal sometimes a little longer than lateral petals; stamen filaments opposite sepals longer than opposite petals; anthers 0.7–0.9 mm. Cocci 3–3.5 mm. 2n = 24.
Phenology: Flowering and fruiting Apr–Nov.
Habitat: Open rocky shrublands, mostly on limestone.
Elevation: 60–700 m.
Tex., Mexico (Baja California Sur), Mexico (Coahuila), Mexico (Durango), Mexico (Nuevo León), Mexico (San Luis Potosí), Mexico (Sinaloa), Mexico (Sonora), Mexico (Tamaulipas)