Flora of North America species comparison

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

unbranched or branched basally, branched distally, (1–)2–6(–8) 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(–5) cm;

blade lanceolate to linear-lanceolate, (2–)3–7(–10) cm × 4–15(–20) mm, base cuneate to attenuate, margins pinnately lobed to coarsely dentate.

(proximalmost) petiole 1–4(–5) cm, (distalmost) shortly petiolate or subsessile;

blade linear to narrowly lanceolate, base cuneate, margins usually entire, rarely dentate, or 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 (2.5–)3–4 × 1–1.5 mm, pubescent abaxially;

petals white or lavender, 4–7(–8) × (2.5–)3–4(–5) mm, attenuate to claw, claw 1–1.5 mm, expanded basally;

filaments white, 2–3.5 mm;

anthers 0.7–1 mm.

divaricate, sometimes ascending or slightly reflexed, slender.

divaricate to slightly reflexed, (6–)8–14(–22) 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 usually transversely ovoid-oblong, rarely suborbicular, 4–5.5(–6) × (4–)5–7(–7.5) mm (often longer than wide), base slightly rounded, apex truncate, with or without narrow wing beyond indurated part surrounding seeds, glabrous or pubescent;

style 0.5–1(–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, 2–3 × 1.5–2 mm.

= 9.

= 18.