Plants annual. Stems 10--20 cm tall, branched or unbranched, basally sparsely pubescent. Leaves long petiolate, clustered apically on stem; leaf blade ca. 3.5 cm, increasing in size upward on stem to 6 cm, glabrous or abaxially sparsely pubescent; upper stem leaves finely 2 or 3 × pinnately divided; ultimate segments linear to lanceolate-linear, 0.4--0.8 mm wide. Sepals 5, narrowly rhombic to narrowly ovate, membranous. Petals orange. Ovary narrowly ovoid with a dorsal ridge, apically narrowed. Achenes ovoid, ca. 3.5 mm, reticulate-veined, with conspicuous dorsal and ventral ridges. Fl. Jun.