Flora of North America species comparison

ascending to erect, often unbranched, 0.4–2.3 dm, moderately pubescent.

erect to decumbent or ascending, unbranched or branched.

blade margins entire or, sometimes, sinuate-dentate, surfaces glabrescent to moderately pubescent.

basal and, sometimes, cauline;

petiolate or sessile;

basal rosulate, petiolate, blade margins entire, sinuate, dentate, or, rarely, pinnately lobed;

cauline usually absent, rarely few present, (sub)sessile, blade margins usually entire, rarely dentate or pinnately lobed.

(corymbose, sometimes bracteate basally or throughout), elongated or not in fruit.

petals white, (4.4–)4.9–6.7(–7.2) × (2.1–)2.3–4(–4.2) mm.

sepals [sometimes persistent], oblong [ovate], lateral pair not saccate basally (sometimes slightly so in B. humilis and B. linearis);

petals white, pink, or purple [rarely pale yellow], obovate, oblanceolate, or spatulate, (slightly to much longer than sepals), claw distinct or not, (shorter than sepal, apex obtuse or rounded);

stamens tetradynamous;

filaments dilated or not basally;

anthers ovate or oblong, (apex usually obtuse, sometimes apiculate);

nectar glands (4), lateral, 1 on each side of lateral stamen.

erect, divaricate, or ascending, slender (much narrower than fruit).

often abortive, somewhat torulose, 0.7–1.2 mm wide when fully developed;

septum not fenestrate or split longitudinally.

siliques or silicles, sessile, linear, oblong, cylindrical, oval-elliptic, ovoid, lanceoloid, lanceoloid-subulate, or globose, smooth or torulose, terete or slightly latiseptate;

valves each often with prominent midvein, glabrous or pubescent;

replum rounded;

septum complete, (membranous, translucent);

ovules (5–)14–44 per ovary;

stigma capitate, entire or slightly 2-lobed.

plump, not winged, oblong or ovoid;

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

cotyledons incumbent.

= 7.

= 28.