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Annual, (10-) 20-70 cm tall, erect, mostly branched above, hairy below with long ciliate white hairs; branches almost aphyllous. Basal leaves rosulate, runcinate-pinnatifid, 4-12-jugate, shortly petioled, hispid; terminal lobe often small, obliquely cordate, ± trilobate, sinuate-dentate; lateral lobes narrow, ± oblong, often sub-recurved; upper leaves much smaller, few, oblong or linear, 10-30 mm long, 4-8 mm broad, dentate or entire, acute, ± hairy. Racemes 10-20-flowered, lax, increasing up to 30 cm in fruit. Flowers 4-7 mm across, pale yellow; pedicel 2-6 (-9) mm long, increasing up to 20 mm (rarely more) and slightly thickened in fruit, spreading. Sepals c. 3 mm long, 1.5 mm broad, oblong, obtuse. Petals 4.5-6.5 mm long, 1.5 mm broad, oblong-obovate, apex rounded, pale yellowish, often with dark veins. Stamens c. 3:4 mm long; anthers c. 1 mm long. Siliquae 35-65 mm long, 2-3 mm broad, linear-oblong, including 10-20 mm long, smooth, usually 1-seeded, slightly tapering beak, often slightly curved at the apex, ± glabrous, subtorulose; valve with a prominent mid-vein; stigma sessile, depressed-capitate, subemarginate; seeds uniseriate, many, c. 1 mm in diam., globose, dark brown, finely tuberculated, mucilaginous when wet.


Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA

Source: Missouri Botanical Garden

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