Pycnosorus pleiocephalus

Erect or ascending annual, to c. 40 cm high; stems many, unbranched, sparsely cobwebbed. Basal leaves few, oblanceolate; cauline leaves c. oblanceolate, 1–7 cm long, 2–10 mm wide, acute to obtuse, gland-tipped, surfaces green, with glandular and flattened septate hairs. Compound heads ovoid or globose, solitary or 2–6 with secondary heads; main compound head 10–15 mm diam.; bracts of common involucre 1- or 2-seriate, linear to elliptic, 3–4 mm long, herbaceous with broad scarious margins; capitula 40–60; capitular bracts ovate, 2.5–3 mm long, herbaceous with broad scarious margins, finely ciliate; involucral bracts 5 or 6, oblanceolate, scarious, apices yellow. Florets lemon-yellow. Cypselas 1.5–2 mm long; pappus bristles 8–15, plumose, 2–4 mm long. Flowers mostly Aug.–Oct.