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Plants densely pubescent, trichomes appressed, stellate mixed with simple ones. Stems simple or few from base, (2-)3-8(-11) dm. Basal leaves (withered by flowering) : blade oblanceolate, (2.5-)3.5-8(-10) cm, base cuneate or attenuate, apex obtuse. Cauline leaves: blade apex acute or obtuse. Fruiting pedicels appressed to rachis, (4-)5-9(-12) mm. Flowers: sepals 2-2.5 mm; petals narrowly obcordate, (4-)5-6.5(-8) mm (lobes oblong, (1-)1.5-3 × 0.5-1.5 mm); filaments white, median pair 2-3.3 mm, lateral pair 0.3-1 mm; anthers 0.5-1 mm. Fruits (4-)5-8.5(-10) × (2-)2.5-4 mm; valves obtuse at both ends, trichomes sometimes with unequal rays; style 1-4 mm, sparsely pubescent basally. Seeds slightly flattened, narrowly margined, 1-2.3 mm diam. 2n = 16.
Stellate-canescent annual to perennial, stiffly erect, usually branched above, to 7 dm; lvs oblanceolate, (1–)2–5 cm, acute, entire; fls white, 3 mm wide; fr elliptic, plump, thinly hairy, 5–8 × 3–4 mm, convex over the whole surface; seeds 3–6 per locule; 2n=16. Native of Europe, established as a weed throughout much of our range, especially northward.
