Description

Key Characters:

Growth Form: Annuals [perennials]; not scapose; glabrous or pubescent.

Stems: Stems erect, unbranched or branched basally.

Roots:

Leaves: Leaves simple. Basal and cauline. Basal not rosulate. Base of cauline leaves not auriculate. Margins of basal leaves usually pinnate to lyrately pinnatifid, rarely undivided, dentate; cauline margins lobed, subentire, or dentate. Basal leaves petiolate; cauline leaves subsessile or shortly petiolate. Stipules absent.

Flowers: Flowers in racemes (corymbose, several-flowered), greatly elongated in fruit. fruiting pedicels erect [ascending], (usually appressed to rachis), slender to stout. Flowers bisexual (perfect). Calyx of 4 sepals; sepals ascending, oblong, lateral pair not saccate basally, (hispid [glabrous or with subapical tuft of hairs]). Corolla of 4 petals; petals yellow, obovate, claw differentiated from blade, (apex ± truncate). Stamens 6, tetradynamous; filaments not dilated basally; anthers ovate to suboblong, (apex obtuse). Ovary superior.

Fruit: Silicles indehiscent; sessile; segments 2; elliptic to oblong; torulose; (slightly to strongly constricted at transverse joint); terete (cylindrical) or angular; (valvular segment persistent; dehiscent [indehiscent]; 1(–3)-seeded; longitudinally striate or smooth; occasionally seedless and nearly as wide as pedicel; terminal segment indehiscent; caducous at maturity; usually 1-seeded; rarely seedless); valves glabrous or pubescent; septum complete; ovules 2–4; (style persistent; filiform); stigma capitate; (flattened); 2-lobed. Seeds uniseriate; slightly compressed; not winged; ovoid [oblong]; seed coat (smooth); not mucilaginous when wetted; cotyledons conduplicate.

Ploidy:

Habitat:

Elevation Range: