Annuals; not scapose; hirsute [glabrous], (trichomes often retrorse). Stems usually erect or ascending, rarely decumbent, usually branched, rarely simple. Leaves basal and cauline; petiolate or subsessile; basal not rosulate, petiolate, blade 1-or 2-pinnatisect, margins entire; cauline subsessile or shortly petiolate, blade 1-or 2-pinnatisect, (base not auriculate), margins entire. Racemes (lax), considerably elongated in fruit. Fruiting pedicels strongly recurved, often secund, not thickened. Flowers: sepals erect, oblong-linear, lateral pair slightly saccate basally; petals cream or pale yellow (with dark purple or brown veins, longer than sepals), spatulate to obovate, claw strongly differentiated from blade; stamens tetradynamous, (erect); filaments not dilated basally; anthers ovate to oblong, (apiculate); nectar glands: lateral intrastaminal, globose to semi-annular, median glands present (distinct). Fruits silicles, dehiscent, sessile, segments 2, ovoid to ellipsoid, terete; (proximal segment not torulose, 4-6-seeded; terminal segment indehiscent, flattened, cochleariform to short-lingulate, seedless); valves each with prominent midvein and distinct marginal veins, glabrous except setose or hirsute on veins; replum rounded; septum complete; ovules 4-6 per ovary; (style obscure); stigma capitate, 2-lobed. Seeds biseriate, plump, not winged, subglobose; seed coat (smooth), mucilaginous when wetted; cotyledons conduplicate. x = 8.
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Annual herbs. Hairs simple. Stems erect or ascending, leafy. Lvs 1-2-pinnatifid; lobes linear. Racemes ebracteate. Sepals erect, the inner weakly saccate. Petals pale yellow, with purple veins. Stamens 6, without appendages. Lateral nectaries 2, dumbell-shaped, behind single stamens; median nectaries 2, triangular, between bases of paired stamens. Style short; stigma capitate. Silicle oblong, dehiscent; valves distinctly 3-veined; beak flattened, tongue-like, seedless. Seeds flattened, ovoid to triangular, ridged on margin, 3 per locule.
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