Haplopappus lanceolatus (Hooker) Torrey & A. Gray subsp. solidagineus (Greene) H. M. Hall; H. lanceolatus var. sublanatus Cody; H. lanceolatus subsp. tenuicaulis (D. C. Eaton) H. M. Hall; H. lanceolatus var. tenuicaulis (D. C. Eaton) A. Gray; H. lanceolatus subsp. vaseyi (Parry ex D. C. Eaton) H. M. Hall; H. lanceolatus var. vaseyi Parry ex D. C. Eaton

Plants 25–35(–50) cm. Stems erect to ascending or decumbent, glabrous or sparsely tomentulose. Leaves: basal blades 50–180(–300) × 10–20(–30) mm, finely spinulose-serrate, faces glabrous or petioles sparsely tomentose, eglandular. Heads (1–)5–20(–50) in corymbiform or paniculiform arrays. Peduncles 0–6 cm. Involucres 7–10 × 12–18 mm. 2n = 12, 24, 36.

Flowering Jun–Sep. Alkaline meadows, hillsides, roadsides; 1300–2800 m; Alta., Sask.; Calif., Colo., Idaho, Mont., Nebr., Nev., N.Dak., Oreg., Tex., Utah, Wyo.