Herbs annual, 5-35(-50) cm tall, canescent with appressed, sessile, 6-10-rayed stellate trichomes, these mixed with simple and forked ones on pedicels and sepals. Stems erect, ascending, or decumbent, 1 to several from the base. Cauline leaves subsessile or lowermost shortly petiolate; leaf blade narrowly oblanceolate or linear, sometimes spatulate or obovate, 3-4(-4.5) cm × (0.5-)1-3.5(-5) mm, base attenuate or cuneate, apex obtuse or acute. Fruiting pedicels divaricate or ascending, 2-5(-6) mm, slender, straight, covered with stellate trichomes mixed with fewer, simple and forked ones. Sepals oblong, (1.5-)2-3 × 0.7-1.1 mm, persistent, pubescent as pedicels. Petals white or pale yellow, linear to linear-oblanceolate, rarely obovate, 2-3(-4) × 0.3-0.7(-1) mm, glabrous or sparsely stellate outside, often persistent, apex emarginate. Filaments 1-1.5 mm, slender, neither appendaged nor toothed; anthers ovate, 0.15-0.2 mm. Ovules 2 per locule. Fruit orbicular, (2-)3-4(-5) mm in diam., apex emarginate or truncate; valves not veined, uniformly inflated at center, strongly flattened at margins, sparsely stellate; style 0.3-0.6(-1) mm, slender, usually glabrous. Seeds 1 or 2 per locule, oblong or ovate, 1.1-2 × 0.7-1.1 mm, compressed, narrowly margined all around, margin ca. 0.1 mm wide. Fl. and fr. May-Jul. 2n = 32.
Annuals; canescent throughout, trichomes appressed, 6-10- rayed, mixed with simple and forked on pedicels and sepals. Stems simple or few to several from base, erect, ascending, or decumbent, (unbranched or branched distally), 0.5-3.5 (-5) dm. Cauline leaves subsessile or (proximal) shortly petiolate; blade usually narrowly oblanceolate to linear, sometimes spatulate or obovate, 3-4(-4.5) cm × (0.5-) 1-3.5(-5) mm, base attenuate or cuneate, apex obtuse or acute. Fruiting pedicels divaricate or ascending, straight, slender, 2-5(-6) mm, trichomes stellate, with fewer, simple and forked ones. Flowers: sepals (persistent) oblong, (1.5-)2-3 × 0.7-1.1 mm, pubescent as pedicels; petals (often persistent) white or pale yellow, usually linear to linear-oblanceolate, rarely obovate, 2-3(-4) × 0.3-0.7(-1) mm, apex emarginate, glabrous or sparsely stellate-pubescent abaxially; filaments (slender) not appendaged, toothed, or winged, 1-1.5 mm; anthers ovate, 0.15-0.2 mm. Fruits orbicular, (2-)3-4(-5) mm diam., apex emarginate or truncate; valves uniformly inflated at middle, strongly flattened at margins, sparsely stellate-pubescent; ovules 2 per ovary; style (slender), 0.3-0.6(-1) mm, basally stellate-pubescent or glabrous. Seeds oblong to ovoid, compressed, 1.1-2 × 0.7-1.1 mm, margins narrow, ca. 0.1 mm wide. 2n = 32.
Annual, 5–25 cm, stellate-hairy throughout; lvs oblanceolate, 6–15 mm, entire, obtuse; fls pale yellow or nearly white, 2 mm wide; pet narrowly oblong; frs on widely divergent pedicels, orbicular, 3–4 mm, flat at the margin, convex toward the center; seeds 2 per locule; 2n=32. Native of Europe, abundant as a weed in waste places nearly throughout our range, and to w. U.S. May, June. (Clypeola a.)
5–20 cm hoch, aufrecht oder aufsteigend, meist vom Grund an verzweigt. Ganze Pflanze von Sternhaaren grau. Stängelblätter spatelförmig, bis 2 cm lang, in den kurzen Stiel verschmälert. Kronblätter blassgelb, zuletzt weiss, 2–4 mm lang. Fr