Flora of North America species comparison

erect to decumbent or ascending, unbranched or branched.

simple or few to several from base, erect, (usually unbranched), (0.4–)0.7–1.4(–1.8) dm.

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.

(without distinct petiole);

blade linear to narrowly spatulate, 0.5–3 cm × 0.5–2(–3) mm, base attenuate or cuneate, margins dentate (with 1 or 2 teeth per side) or entire, apex obtuse, (surfaces glabrous or sparsely pubescent).

1–4 (each stem); (subsessile);

blade similar to basal, smaller distally. (Racemes not elongated in fruit.) Fruiting pedicels erect to divaricate, 1–4.5 mm.

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

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.

sepals 1.8–2.8 × 1–1.4 mm (sometimes slightly saccate basally);

petals white or purplish (especially claw), (broadly obovate or spatulate), 2.5–3.5(–4) × 1.3–2 mm;

filaments 1.5–2 mm;

anthers oblong, 0.4–0.6 mm.

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

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.

linear, more or less torulose, (straight or somewhat curved), (0.5–)0.9–1.2(–1.4) cm × 0.9–1.3 mm (uniform in width);

valves glabrous or sparsely pubescent, trichomes simple and submalpighiaceous;

septum margin not expanded, or not basally;

ovules 20–28 per ovary;

style 0.3–0.5 mm;

stigma weakly 2-lobed to entire.

plump, not winged, oblong or ovoid;

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

cotyledons incumbent.

uniseriate to weakly biseriate, oblong, 0.8–1 × 0.3–0.6 mm.

= 7.

= 42.