Herbs, annual. Stems branched, erect or ascending, to 30 cm or more tall, rarely rooting at nodes. Petiole 1-2 cm; leaf blade ovate to ovate-lanceolate, 2-4 × 1-2.5 cm, 3-veined, base cuneate, margin entire or coarsely or crenately serrate, apex acute. Capitula discoid, solitary, terminal or axillary, 8.4-12.5 × 6.9-10 mm; peduncles 2.5-16 cm, sparsely pilose; phyllaries 9-12, 2-seriate, ovate-lanceolate, ca. 6 mm, herbaceous, glabrous; receptacle 5-8 × 1.1-3 mm, apex acuminate. Florets 90-200; corollas tubular, minute, 4- or 5-lobed. Achenes obovoid, 3-angled, ca. 3 mm, margin scabrid, apex slightly depressed; pappus of 2 subequal bristles, longer one 0.5-1.1 mm, shorter one 0.4-0.9 mm. Fl. Apr-Nov. 2n = 26.