Thymophylla tenuiloba Small

Annuals to 30 cm high, glabrous or sparsely hirtellous. Stems decumbent to erect. Leaves green, mostly alternate (sometimes opposite at 1–3 proximal nodes), 12–28 mm long, pinnati-sect; lobes 7–15, linear to filiform, with pex aculeate. Capitula obconical, 5–7 mm long; peduncles 30–80 mm long, glabrous or hirtellous; calyculus of 3–8 bractlets, less than 1/2 length of involucral bracts; involucral bracts 12–22, fused except at distal end, glabrous or sparsely hirtellous. Ray florets 10–21, yellow-orange; ligule 4–10 mm long, 1.5–3 mm wide. Disc florets 50–100+; corollas yellow, 2.5–4.5 mm, sometimes zygomorphic. Achenes 2–3.5 mm long. Pappus of aristate scales 0.7–3.5 mm long.