Mohr's Rosinweed

Plants caulescent, 40–160 cm; fibrous rooted. Stems terete, shaggy-hispid. Leaves: basal persistent, petiolate; cauline usually alternate, sometimes opposite, petiolate or sessile; blades lanceolate to narrowly ovate, 1.5–26 × 0.5–14 cm, bases attenuate to acute, margins coarsely toothed or entire, apices acuminate, faces shaggy-hispid. Phyllaries 14–19 in 2–3 series, outer appressed, apices acuminate to acute, abaxial faces shaggy-hispid. Ray florets 10–20; corollas pale yellow. Disc florets 40–85; corollas pale yellow. Cypselae 6–10 × 4–7 mm; pappi 1–2 mm.