Flora of North America species comparison

simple or few to several from base, decumbent to prostrate or, sometimes, ascending, (unbranched), (0.3–)0.5–0.9(–1.4) dm.

blade spatulate to linear-spatulate, (0.5–)1–3(–4) cm × 1–4 mm, base (membranous), broadly expanded near point of attachment, margins entire, (ciliate, trichomes long, mostly simple), apex obtuse, often with tuft of hairs.

0 or 1 (or a leaflike bract subtending proximalmost pedicel).

(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.

sepals 2–3.5 × 1–2 mm;

petals white to purplish, (narrowly spatulate), 2–3.7 × 1–1.5 mm, (claw and blade not differentiated), apex rounded;

filaments 2–2.5(–3) mm;

anthers ovoid, 0.4–0.6 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.

divaricate to erect, 1.5–4 mm.

ovoid to globose, not torulose, (0.4–)0.5–0.8(–1) cm × (2.5–)3–5 mm;

valves densely pubescent or glabrous, trichomes 2-forked and simple;

septum margin not expanded, or not basally;

ovules 16–30 per ovary;

style obsolete to 0.7(–1) mm;

stigma strongly 2-lobed or entire.

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.

biseriate, oblong, (1.1–)1.2–1.4(–1.5) × (0.5–)0.7–0.8(–1) mm.

usually biseriate or uniseriate (aseriate in Euclidium);

cotyledons accumbent or incumbent.