Flora of North America species comparison

petiolate or sessile;

blade base auriculate or not, margins entire, dentate, or pinnately lobed.

usually simple, rarely forked or dendritic [subdendritic], sometimes absent.

(moderately to strongly congested), not elongated in fruit;

central rachis (4.3–)8–20 cm.

usually ebracteate, often elongated in fruit.

petals white, (7.5–)8–11(–13) mm;

gynophore stout, (1–)1.5–4(–5.5) mm.

usually actinomorphic, rarely zygomorphic;

sepals erect, ascending, spreading, or reflexed, lateral pair saccate or not basally;

petals white, yellow, orange, pink, lilac, lavender, purple, green, brown, or nearly black, claw present, often distinct;

filaments unappendaged, not winged;

pollen 3-colpate.

usually horizontal to reflexed, rarely divaricate, straight, whitish, stout, (6–)7–11(–13) mm, strongly flattened at base.

usually horizontal to reflexed, rarely divaricate, straight or incurved to arcuate, (2.2–)3.5–6.5(–8) cm.

usually siliques, rarely silicles, usually dehiscent, unsegmented, usually terete, 4-angled, or latiseptate;

ovules 1–210[–numerous] per ovary;

style obsolete, distinct, or absent;

stigma usually entire or 2-lobed (subentire in Sibaropsis, Streptanthella).

usually biseriate or uniseriate, rarely aseriate;

cotyledons accumbent or incumbent.