Flora of North America species comparison

usually ascending (prostrate in fruit), unbranched, 0.3–1.6 dm, moderately pubescent.

erect to decumbent or ascending, unbranched or branched.

blade margins pinnatifid or entire, surfaces 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 or purple-tinged, (3–)4–5.6 × (1.3–)2–3.3(–3.8) 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).

usually fertile and fully developed, not or weakly torulose, (1–)1.2–1.8(–2) mm wide;

septum often fenestrate (with circular perforations at regular intervals longitudinally or with a narrow, elliptical, longitudinal split at base or both).

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.

= 42.