Contr. U.S. Natl. Herb. 18: 95. 1916.
Herbs, perennial, 5–10 dm. Stems erect to ascending or sprawling, sparsely pubescent. Leaves opposite; blade ovate, 3–6 × 2–4 cm, apex rounded to acute, pubescent. Inflorescences: panicles 1.5–4 dm; bracts and bracteoles 1/2–1/3 as long as tepals. Flowers pedicellate; tepals whitish to stramineous, ovate, 1–1.3 mm, apex acute, densely lanate. Utricles included in tepals, greenish, ovoid, 0.8 mm, apex acute. Seeds 0.6 mm.
Phenology: Flowering summer.
Habitat: Sheltered ravines, canyons, pastures
Elevation: 1400-2000 m
Ariz., N.Mex., Tex., Mexico (Chihuahua, Coahuila, Durango, Nuevo León, Sonora).