Proc. Biol. Soc. Wash. 7: 69. 1892. (as Buddleia)
Shrubs, 3–10 dm. Stems much-branched, gray-tomentose. Leaves: stipular lines faint; petiole 0 mm; blade grayish, linear to oblong, 1.5–3.5 × 0.3–0.5 cm, base attenuate, margins involute, crenate to undulate, apex rounded, surfaces densely glandular-tomentose. Inflorescences terminal, pseudoverticillate spikes, 4–12 × 0.8–1.3 cm, cymes 3–7 pairs, 5–15-flowered. Pedicels absent; bracteoles present or absent. Flowers slightly fragrant; calyx glandular-tomentose externally, tube 2.5–3.5 mm, lobes 1–2 mm; corolla light yellow, salverform, tube 4–5 mm, lobes orbiculate, 1–1.2 × 1.5–1.7 mm; stamens inserted 1.5–1.7 mm proximal to orifice of corolla tube, included in tube; ovary ovoid, 1–1.5 mm, distal 1/2 tomentulose; stigma clavate, slightly 2-lobed at apex, 0.5–1 mm. Fruits capsules, brown, ovoid, 2–2.5 × 1.3–1.5 mm, tomentulose near apex, dehiscence septicidal and loculicidal. Seeds ellipsoid, 0.4–0.5 × 0.2–0.3 mm, wings absent.
Phenology: Flowering Apr–Aug; fruiting Jun–Sep.
Habitat: Limestone outcrops in pinyon-juniper and Joshua tree woodlands.
Elevation: 700–2000 m.
Ariz., Calif., Nev., Utah.