Annuals, 5–44 cm. Stems 1–4, erect to ascending, usually branched proximally and distally, glabrous (usually glaucous). Cauline leaves: proximal obovate, usually pinnately lobed (lobes 3–8 pairs, ± equal, bases white-hairy), ± fleshy, ultimate margins dentate, faces glabrous; distal reduced (sometimes 2–4-dentate near bases). Calyculi of 8–12+, ovate to lanceolate bractlets, hyaline margins 0.05–0.3 mm wide. Involucres ± campanulate, 5–8 × 2–6 mm. Phyllaries 18–22+ in 2–3 series, oblong or lanceolate to linear, hyaline margins 0.05–0.2 mm wide, faces glabrous. Receptacles not bristly. Florets 30–65; corollas white, 5–8 mm; outer ligules exserted 1–3 mm. Cypselae ± cylindro-funnelform or weakly prismatic, 1.2–2 mm, ribs extending to apices, ± equal or 5 more prominent than others; pappi 0 or crenate crowns (0.01–0.1 mm). Pollen 70–100% 3-porate. 2. = 14.
Home