Flora of North America species comparison

erect to decumbent or ascending, unbranched or branched.

simple or few to several from base, erect, 0.2–0.7(–10) 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.

blade narrowly spatulate to oblanceolate, (0.5–)1–3(–4) cm × 1–3 mm, base (membranous), broadly expanded near point of attachment, margins entire, (sparsely ciliate proximally), apex obtuse.

0 or 1 (or a leaflike bract subtending proximalmost pedicel).

(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 2–2.6 × 1–1.5 mm;

petals white or rose-purple, 2.4–3.8(–4) × (0.8–)1–1.3(–2) mm, (claw and blade often gradually and not well-differentiated, apex rounded);

filaments 1.7–2 mm;

anthers oblong, 0.3–0.4 mm.

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

erect or ascending, 1–2.6 mm.

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.

lanceoloid-subulate, not torulose, (straight), (0.3–)0.4–0.7 cm × (0.7–)1–1.5(–1.7) mm;

valves densely to moderately pubescent, trichomes 2-forked and simple;

septum margin broadly expanded basally (forming sacklike pouch around proximalmost seed in each locule);

ovules 10–16 per ovary;

style (0.5–)0.6–1(–1.2) mm;

stigma 2-lobed or entire.

plump, not winged, oblong or ovoid;

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

cotyledons incumbent.

uniseriate, oblong, (0.9–)1–1.3 × (0.4–)0.5–0.6(–0.7) mm.

= 7.

= 56.