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.

(often strongly congested), not elongated in fruit;

central rachis (0.6–)1.2–7(–9) cm.

usually ebracteate, often elongated in fruit.

petals usually lavender, rarely white, (5–)6–8.5(–9.5) mm;

gynophore stout, 0.5–1(–3) 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.

horizontal, straight, not whitish, stout, 3–5(–6) mm, strongly flattened at base.

horizontal or divaricate-ascending to ascending, straight or incurved, (0.9–)1.4–2.7(–3.4) 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.