Flora of North America species comparison

often erect, sometimes ascending, rarely subprostrate or decumbent, often branched distally, sometimes unbranched.

basal and cauline;

petiolate or sessile;

basal rosulate or not, petiolate, blade margins dentate, sinuate, lyrate, runcinate, or pinnately lobed [entire];

cauline similar to basal, (blade smaller distally).

petiolate or sessile;

blade base not auriculate [auriculate], margins usually pinnately lobed or dentate, sometimes entire.

simple or absent, [rarely branched].

(several-flowered), often considerably elongated in fruit.

(usually racemose, sometimes fasciculate, or flowers solitary in Sisymbrium polyceratium), usually ebracteate (bracteate in S. polyceratium), often elongated in fruit.

sepals ovate or oblong, (glabrous or pubescent);

petals yellow, obovate, spatulate, oblong, or suborbicular, (longer than sepals), claw differentiated from blade, (subequaling or longer than sepals, apex obtuse or emarginate);

stamens tetradynamous;

filaments not dilated basally;

anthers oblong, (apex obtuse);

nectar glands confluent, subtending bases of stamens, median glands present.

actinomorphic;

sepals erect to spreading, lateral pair seldom saccate basally;

petals yellow [pink, white], claw present, often distinct;

filaments unappendaged, not winged;

pollen 3-colpate.

ascending, divaricate, or erect, slender or stout (sometimes as wide as fruit).

usually sessile, rarely shortly stipitate (gynophore to 1 mm), usually linear, rarely lanceolate or subulate, smooth or torulose;

valves each with prominent midvein and 2 conspicuous marginal veins, usually glabrous, rarely pubescent;

replum rounded;

septum complete;

style subclavate [clavate, conical, cylindrical];

stigma capitate (lobes not decurrent).

siliques, dehiscent, unsegmented, usually terete [slightly latiseptate];

ovules 6–120(–140)[–160] per ovary;

style usually distinct, rarely obsolete;

stigma 2-lobed.

plump, not winged, oblong [ovoid];

seed coat (reticulate or papillate), not mucilaginous when wetted;

cotyledons incumbent.

uniseriate;

cotyledons incumbent.

= 7.