Iva dealbata A. Gray, Smithsonian Contr. Knowl. 3(5): 104. 1852; Euphrosyne dealbata (A. Gray) Panero

Leaves: petioles 1–5+ mm; blades 7–10(–18+) × 1–6(–12) cm overall, lobes 3–5+ mm wide. Peduncles 1–10+ mm. Involucres 2–3+ mm. Phyllaries: outer 5 sparsely strigose or glabrous abaxially, margins ciliolate, inner ciliolate. Pistillate florets: corollas 0.1–0.7 mm, or 0. Functionally staminate florets: corollas 1.5–2 mm. Cypselae 1.5–2 mm. 2n = 72.

Flowering Jul–Nov. Calcareous desert soils; 1000–2000 m; Ariz., N.Mex., Tex.; Mexico (Chihuahua, Coahuila, Durango, Nuevo León, San Luis Potosí, Zacatecas).