Eupatorium parryi A. Gray in W. H. Emory, Rep. U.S. Mex. Bound. 2(1): 75. 1859

Stems pilosulous and stipitate-glandular. Leaves: petioles 10–25(–35+) mm; blades 25–35(–65+) × 20–35(–45+) mm. Peduncles 2–12(–25+) mm. Involucres 8–9+ mm. Corollas 3.5–4 mm. Cypselae 4.5–5 mm; pappi 3.5–5 mm. 2n = 20.

Flowering Apr–Jul. Among rocks, stream banks, canyons; 400–1400 m; Tex.; Mexico (Chihuahua, Coahuila, Nuevo León).