Flora of North America species comparison

often several, ascending distally, (1.2–)2–6(–7.5) dm.

erect, usually branched distally, rarely unbranched.

basal and cauline; petiolate or sessile;

basal not rosulate, petiolate, blade similar to cauline;

cauline petiolate or sessile, blade (base not auriculate), margins entire, dentate, sinuate, or pinnatifid.

soon withered.

shortly petiolate or (distal) sessile;

blade lanceolate to oblanceolate, or (distal) linear, 2–5.5(–6.5) cm × 3–10(–15) mm, (attenuate to petiolelike base), margins entire, dentate to sinuate, or pinnatifid, (distal cauline (1–)1.7–5.8(–7) cm × (0.7–)1.5–4(–7) mm, base cuneate to attenuate, margins entire, apex obtuse to acute).

(corymbose, several-flowered, lax), considerably elongated in fruit.

sepals (2–)2.5–4(–5) × 0.7–1.5 mm;

petals (3.5–)4–6(–7) × 0.7–1.1 mm, claw oblanceolate, 3–5 mm (longer than blade);

filaments with at least dorsal pair exserted, (longest pair) 3–6 mm;

anthers 0.5–1(–1.3) mm.

sepals erect, oblong, (unequal), lateral pair subsaccate basally;

petals white or yellow (often veins purplish), spatulate, (slightly exceeding sepals, margins crisp), claw well-differentiated from blade, (apex obtuse);

stamens in 3 unequal pairs;

filaments not dilated basally;

anthers ovate to oblong, (apiculate);

nectar glands lateral, semi-annular, subtending lateral stamens, median glands absent.

usually curved, rarely straight, (1–)2–5(–7) mm.

usually reflexed, rarely divaricate, slender or stout.

slightly to strongly reflexed, sometimes secund, (2.5–)3.5–6(–7) cm × 1.5–2(–2.2) mm;

valve apex adnate with style and replum, forming indehiscent tip, often 1-seeded;

style (2–)3.5–6(–8) mm.

sessile, linear, smooth, latiseptate;

valves each with prominent midvein;

replum rounded or slightly flattened;

septum complete;

ovules (12–)16–28(–34);

style distinct, (well-developed, adnate with valves and replum apex);

stigma subentire.

light brown, 2–3 × 1–1.7(–2) mm;

wing 0.3–0.7 mm wide.

uniseriate, flattened, winged, oblong;

seed coat not mucilaginous when wetted;

cotyledons incumbent.

= 7.

= 28.