Annuals; (glaucous), usually glabrous throughout (sometimes distalmost stems and pedicels pubescent). Stems (simple from base), usually branched, 1.2-10 dm, (sometimes sparsely pilose distally). Basal leaves (soon withered); subrosulate; petiolate; blade oblanceolate in outline, 4-20 cm, margins sinuate to lyrate or pinnatifid. Cauline leaves: blade ovate, 1.5-15 cm × 5-60 mm, (smaller distally), base auriculate to amplexicaul, margins entire or sinuate-dentate (entire distally). Racemes usually ebracteate or proximalmost flowers bracteate, rarely bracteate throughout, (lax). Fruiting pedicels divaricate to ascending, (straight), 7-35 mm, (glabrous or pilose). Flowers: calyx campanulate; sepals purple to deep maroon, (lanceolate), 8-12 mm, not keeled; petals (spreading to reflexed), lavender or purplish lavender, 16-27 mm, blade 10-18 × 6-9 mm, margins not crisped, claw 6-10 mm (crisped); stamens in 3 unequal pairs; filaments (distinct): abaxial pair 4-6 mm, lateral pair 3-5 mm, adaxial pair 5-8 mm; anthers (all) fertile, 4.5-6 mm; gynophore 0.3-1 mm. Fruits erect to divaricate-ascending, smooth, straight, strongly flattened, 4-9.5 cm × 4.5-6 mm; valves each with prominent midvein; replum straight; ovules 26-42 per ovary; style 0.5-2 mm; stigma strongly 2-lobed. Seeds orbicular to oblong-orbicular, 4.5-5 × 4-5 mm; wing 0.7-1.2 mm wide, continuous. 2n = 28.
Home