Brickellia tenuiflora (de Candolle) D. J. Keil & Pinkava

Stems usually puberulent and villous (hairs crinkled, multi-cellular), sometimes glabrate. Petioles 1–5 cm, villous-ciliate. Leaf blades (proximal to mid stem) broadly ovate to cordate, 2–8 × 1.5–6 cm, bases obtuse to truncate or subcordate, margins subentire to dentate, margins villous-ciliolate (sometimes sparsely villous along veins as well), apices obtuse to acute. Heads 1–10+ per principal node, ascending to erect; sessile or on peduncles to 7 mm. Involucres 9–12 mm. Phyllaries glabrous (margins sometimes ciliolate). Corollas 5–6 mm, slightly exceeding pappi, 0.2–0.3 mm diam., apices slightly constricted, lobes 0.15–0.2 mm; anthers included, ca. 0.8 mm; style branches usually short-exserted. Cypselae gray to nearly black, 3.5–5 mm; pappi white, 5–8 mm. 2n = 20.

Flowering Aug–Oct. Oak-juniper woodlands, cypress woodlands, grasslands, riparian areas; 1000–2200 m; Ariz., N.Mex., Tex.; Mexico.