Annuals; (often glaucous). Stems simple or few to several from caudex, erect or ascending, branched basally, (0.6-)1-3(-4) dm. Basal leaves rosulate or not; petiole 0.5-1 cm; blade (not fleshy), obovate, spatulate, or oblong, 0.5-1.5(-2.5) cm × 2-5 mm, margins usually entire, rarely dentate or pinnatifid, apex obtuse. Cauline leaves sessile; blade cordate, ovate, or oblong, 0.4-1.7(-2.5) cm × 1-7(-10) mm, base deeply sagittate-amplexicaul, margins entire or repand, apex acute or obtuse. Racemes elongated in fruit, (rachis straight). Fruiting pedicels divaricate to divaricate-ascending, (slender), 3-10 mm. Flowers: sepals oblong, 1-1.5 × 0.5-0.6 mm; petals obovate, 2-3 × 1-1.7 mm; filaments 1-1.5 mm; anthers oblong, 0.2-0.4 mm, (apiculate). Fruits sessile, linear, distinctly torulose, 0.7-1.6(-2) cm × (0.7-)0.8-1 mm, terete; valves each obscurely veined; septum complete; ovules 55-96 per ovary; style 0.1-0.3 mm. Seeds (biseriate) oblong, 0.4-0.5 × 0.2-0.3 mm. 2n = 14. Flowering May-Jun. Sandy alkaline ground, saline flats and fields, alkaline sloughs, stream banks, salt meadows and plains, steppes; 600-2500 m; B.C., N.W.T., Sask., Yukon; Colo., Mont.; c, e Asia.