Callaeum septentrionale (A.Juss.) D.M.Johnson

Leaf blades lanceolate to elliptic-ovate, larger blades 20–70(–95) × 6–40 mm, base cuneate to rounded, apex acute or acuminate, abaxial surface tomentose or sparsely sericeous to glabrate, adaxial surface glabrous, bearing 1–3 small glands on each side near petiole apex or blade margin. Pedicels 6–24 mm, 1.8–5 times as long as peduncles. Samaras orbiculate or butterfly-shaped, lateral wings 10–42(–55) × 16–21 mm, dorsal wing 10–17 × 6 mm. 2n = 20 (Mexico).