Flora of North America species comparison

erect [ascending], unbranched or branched proximally, branched distally.

unbranched proximally, branched distally, (3–)4–8(–10) dm.

basal and cauline;

petiolate or sessile;

basal not rosulate, petiolate, blade margins dentate, pinnatifid, or lobed;

cauline sessile, subsessile, or shortly petiolate, blade (base not auriculate), margins entire or lobed.

petiole 1–4(–6) cm;

blade lanceolate to oblong or ovate, (2–)4–8(–10) cm × (10–)15–25(–40) mm, base cuneate to obtuse, margins dentate.

(distal) sessile;

blade usually ovate to narrowly oblong, rarely lanceolate, base obtuse to truncate, margins entire, sometimes repand.

(corymbose), considerably elongated in fruit.

sepals widely spreading to reflexed, oblong, (equal), lateral pair not saccate basally;

petals (spreading), white or lavender, obovate (longer than sepals), claw well-differentiated from blade, (apex rounded);

stamens (somewhat spreading), tetradynamous;

filaments not dilated basally;

anthers oblong [sagittate];

nectar glands distinct, lateral and median present; (gynophore to 0.5 mm).

sepals 3.5–5 × 1–1.5 mm, pubescent abaxially;

petals white or lavender, (7–)8–10(–12) × 4–6(–7) mm, attenuate to claw, claw 2–3 mm, not expanded basally;

filaments lavender or white, 3–4 mm;

anthers 1–1.5 mm.

divaricate, sometimes ascending or slightly reflexed, slender.

divaricate, (8–)10–16(–20) mm.

silicles, subsessile, breaking into two 1-seeded units at maturity, didymous, suborbicular, or broader than long, winged, strongly angustiseptate;

valves keeled, enclosing seeds when falling off, not winged, narrowly winged, or margined, indurated around margin, glabrous or pubescent;

replum concealed by valve margin;

septum complete (ca. 0.1 mm wide);

ovules 2 per ovary;

style relatively short or obsolete, (terete or flattened);

stigma conical, decurrently 2-lobed (appearing entire).

each valve suborbicular or orbicular, (7–)8–10 × (6–)7–10 mm, base rounded, apex truncate, with or without narrow margin beyond indurated part surrounding seeds, glabrous or pubescent;

style (0.3–)0.6–1(–1.2) mm.

aseriate, strongly flattened, not winged, broadly oblong to suborbicular;

seed coat (smooth), not mucilaginous when wetted;

cotyledons accumbent to obliquely incumbent.

suborbicular-ovoid, 3–4 × 2.5–3 mm.

= 9.

= 18.