Flora of North America species comparison

erect, unbranched basally, branched distally.

(1.4–)2.5–7.5(–9) dm.

basal and cauline;

petiolate or sessile;

basal not rosulate, shortly petiolate, blade margins entire, dentate, or denticulate;

cauline blade (base sagittate or strongly auriculate), margins usually entire, rarely denticulate.

shortly petiolate;

blade oblanceolate to oblong, 2–7.5 cm × 5–20 mm.

blade lanceolate, narrowly oblong, or linear-lanceolate, (1.5–)2.5–7(–9) cm × (2–)3–15(–25) mm, apex acute or acuminate, surfaces sparsely pubescent, trichomes mostly forked.

(corymbose, several-flowered, forming panicles), considerably elongated in fruit.

sepals erect, oblong-ovate (pubescent);

petals yellow, spatulate, (longer than sepals), claw not differentiated from blade, (apex obtuse);

stamens slightly tetradynamous;

filaments not dilated basally;

anthers ovate, (apex obtuse);

nectar glands lateral, 1 on each side of lateral stamen.

sepals 1.5–1.7 × 0.5–0.7(–1) mm;

petals 2–2.5 × 0.5–0.7(–1) mm;

filaments 1.5–2 mm;

anthers 0.2–0.4 mm.

divaricate-ascending, slender.

straight or slightly curved upwards, (4–)6–10(–14) mm.

silicles, nutletlike, indehiscent, subsessile, woody, compressed globose or sublenticular (readily detached from pedicel at maturity, apex truncate [umbonate]);

valves (1-seeded), prominently reticulate, glabrous;

replum rounded (obscured by valve margin);

septum complete;

ovules 2–4 per ovary; (style distinct, cylindrical, readily caducous at fruit maturity, leaving umbo or apicula);

stigma capitate.

(1.7–)2–2.2 × (2–)2.2–2.5 mm;

style slender, 0.5–0.9 mm.

uniseriate, plump, not winged, ovoid;

seed coat (minutely reticulate), not mucilaginous when wetted;

cotyledons incumbent.

1.2–1.4 × 1–1.1 mm.

= 7.

= 14.