Ceanothus velutinus var. velutinus
Shrubs, 1–3 m. Leaf-blades: abaxial surface velvety puberulent, especially on veins. Capsules: valves smooth. 2n = 24.
Phenology: Flowering May–Aug.
Habitat: Open sites, rocky slopes, montane chaparral, conifer forests.
Elevation: 400–3400 m.
Alta., B.C., Calif., Colo., Idaho, Mont., Nev., Oreg., S.Dak., Wash., Wyo.
Putative hybrids between var. velutinus and Ceanothus cordulatus, reported from the Klamath Mountains, the southern Cascade Range, and the Sierra Nevada, have been called C. ×lorenzenii (Jepson) McMinn. Putative hybrids between C. velutinus var. velutinus and C. prostratus (subg. Cerastes) and named C. ×rugosus Greene have been reported from northeastern California (H. McMinn 1944). Ceanothus ×rugosus, with spreading stems, opposite leaves, and wartlike, semipersistent stipules, is notable in being one of few intersubgeneric hybrids in Ceanothus.
"thin" is not a number.