Flora of North America species comparison

ascending to erect or, rarely, decumbent, usually unbranched, 0.3–1.7(–2.5) dm, densely pubescent.

blade margins usually entire, sometimes weakly sinuate-dentate, surfaces densely pubescent.

(sometimes absent), usually petiolate or sessile, sometimes subsessile;

blade base not auriculate, margins usually entire or dentate, rarely lobed.

short-stalked or sessile, stellate, forked, dendritic, malpighiaceous, or simple, rarely absent.

usually ebracteate, usually elongated in fruit.

petals white, 4.4–6.9 × (1.9–)2.3–4.2 mm.

actinomorphic;

sepals erect [ascending to spreading], lateral pair seldom saccate basally;

petals white, pink, or purple [yellow], claw present, distinct or obscure;

filaments unappendaged, not winged;

pollen 3-colpate.

often abortive, somewhat torulose, 0.8–1.2 mm wide when fully developed;

septum not fenestrate or split longitudinally.

silicles or siliques, usually dehiscent, unsegmented, terete or latiseptate [angustiseptate];

ovules 2–80[–numerous] per ovary;

style distinct or obsolete;

stigma entire or strongly 2-lobed.

usually biseriate or uniseriate (aseriate in Euclidium);

cotyledons accumbent or incumbent.

= 28.