Annual, herbs, 28–80 cm tall. Stem angular, green, densely pubescent, dichotomously branched. Leaves alternate, on 1–4 cm long petiole, lamina 1.5–11 cm long, 1–6 cm wide, stipulate, pinnately divided, entire to deeply lobed, lobes linear to lanceolate, 1–3 cm long, 0.3–0.5 cm wide, strigose. Capitula radiate, terminal, in lax panicles, 3–6 mm across, hemispheric to campanulate. Receptacles flat to convex, paleae ca 2 mm long. Phyllaries 2–seriate, outer 5, lanceolate–ovate, ca 2.5 mm long, 1.4–1.6 mm wide, acute, inner ones green, ovate–orbicular, 1.5–2 mm long, 1.5–2 mm wide. Ray florets 5, white, 2.5–3 mm long, ligules reniform or orbicular. Disc florets 20–25, white or creamy, 2.3–2.5 mm long, corolla tube 5–lobed, lobes acute. Anthers with apical appendages. Cypselas obovoid, or pyriform, often ± obcompressed, 1.5–3.5 mm long, shed together with subtending phyllary and 2 contiguous disc florets and enveloping paleae. Pappus absent or with 1–3, triangular to ovate or ± subulate awns.