Publ. Field Mus. Nat. Hist., Bot. Ser. 22: 61. 1940.
Perennials, 20–90 cm. Stems branched, coarsely scabrous. Leaves alternate to subopposite; petioles 1–5 mm; blades 3-nerved from bases, lanceolate to lanceovate, 20–40 × 7–20 mm, bases rounded to broadly cuneate, margins entire or serrate, apices acute to acuminate, faces sparsely pubescent, stipitate-glandular. Heads in open, racemose or paniculiform arrays. Peduncles 5–45 mm, pubescent, stipitate-glandular. Involucres cylindric to campanulate, 7–11 mm. Phyllaries 16–20 in 4–5 series, greenish, often purple-tinged, 4–8-striate, unequal, margins narrowly scarious, often ciliate (apices acute to long-attenuate); outer lanceovate (pubescent), inner narrowly lanceolate (glabrous). Florets 11–22; corollas pale-yellow or cream, 4.7–6 mm. Cypselae 4–5 mm, silvery-setulose. Pappi of 25–34 white, plumose bristles.
Varieties 2 (2 in flora).
"fine" is not a number.