PLANT: Annual herbs l0–40 cm tall, taller than wide, without tubers or stolons, unarmed, with some branches divergent, pubescent to hirsute. LEAVES: alternate and sub-opposite,simple, lanceolate to ovate, 1–5 cm long, 1–2.2 cm wide, ca. 2 times as long as wide, the margin entire, the blade membranous; apex acute; base rounded to attenuate; petiole 3–20 mm long. INFLORESCENCE: usually solitary flowers (rarely 2-flowered). FLOWERS: actinomorphic; peduncle 6–15 mm long, narrowing at base, strongly deflexed; calyx 3–4 mm long, campanulate, more densely pubescent than leaves, the lobes longer than the tube, linear to oblong; corolla to 10 mm wide, rotate, white, drying yellow; stamens equal; anthers to 3 mm long, not adherent; filaments ca. 1/3 as long as anthers; style straight, about equal to stamens. FRUITS: 5–8 mm in diam., milk-white, descending, not enclosed by the calyx; seeds 2.5–3 mm long, many, yellow-brown, lustrous, reniform. NOTES: In shade of shrubs along washes and hillsides, usually in sandy soils; pine-oakwoodlands: Cochise, Pima, Pinal, Santa Cruz cos. (Fig. 1A); 1000–1700 m (3500–5600 ft); Aug–Sep; AZ to s Mex.; C. Amer. REFERENCES: Chiang, F. and L.R. Landrum. Vascular Plants of Arizona: Solanaceae Part Three: Lycium. CANOTIA 5 (1): 17–26, 2009.