Annuals, 4-42 cm. taprooted. Stems erect or ascending, branched, eglandular or stipitate-glandular, especially distally. Leaves basal and cauline; petiolate (at least basal); blades broadly to narrowly oblanceolate, 2-15 cm, margins entire or remotely toothed or lobed, lobes acute or rounded, apices acute to obtuse, faces glabrous or lightly glandular-villous; cauline appearing unequal and opposite proximal to distal peduncles, petiolate or sessile, blades oblanceolate to linear, gradually reduced, bases ± clasping, margins entire or dentate. Heads borne singly. Peduncles from branching, leafy stems. Involucres 2-8 mm. Phyllaries 5-10, erect in fruit, narrowly to broadly lanceolate, midveins evident, not prominent or keeled, apices acute. Florets 12-35; corollas yellow, 2-11 mm (barely equaling to much surpassing phyllaries). Cypselae fusiform, 1.4-1.7 mm, broadest at or ± beyond middles (apical areas ± equal to basal areoles), 15-ribbed; pappi 0. 2n = 8. The name Krigia oppositifolia Rafinesque, long in use for this species, was not accepted by Rafinesque in his original publication and is therefore invalid.