Flora of North America species comparison

usually petiolate, sometimes sessile;

blade base not auriculate, margins usually pinnatisect or dentate, sometimes entire.

stalked, dendritic or forked, sometimes simple, rarely absent.

ebracteate or bracteate, often elongated in fruit.

actinomorphic;

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

petals usually yellow, sometimes white [pink or purple], claw usually present, sometimes absent, often obscure, obsolete, or distinct;

filaments unappendaged, not winged;

pollen 3-colpate.

silicles or siliques, dehiscent, unsegmented, terete or angustiseptate;

ovules 4–100[–numerous] per ovary;

style usually distinct, sometimes obsolete or absent;

stigma entire.

usually biseriate or uniseriate (rarely 4-seriate in Tropidocarpum);

cotyledons usually incumbent, rarely accumbent.