The World Flora Online

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.

Source: [
• 1
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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.

Source: [
• 2
]. 

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.)

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• 4
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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

Source: [
• 3
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4–5. Trockenrasen, Felsensteppen, kollin-subalpin. J, VS, GR, seltener M, AN und TI.

Source: [
• 3
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