Flora of North America species comparison

erect, ascending, or decumbent [procumbent], branched or, rarely, unbranched.

basal and cauline [or cauline absent];

petiolate or subsessile;

basal rosulate or not, petiolate, blade margins entire, dentate, or pinnatisect;

cauline petiolate or subsessile, blade margins pinnatisect, pinnatifid, dentate, or entire.

usually petiolate, sometimes sessile;

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

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

(corymbose), elongated or not in fruit.

ebracteate or bracteate, often elongated in fruit.

sepals spreading or reflexed, ovate [or oblong], (glabrous or puberulent);

petals white, spatulate, [obovate, oblong, or oblanceolate], (longer or shorter than sepals), claw absent, (apex obtuse or rounded);

stamens (rarely 4), subtetradynamous;

filaments often dilated basally;

anthers ovate, (apex obtuse);

nectar glands lateral, 1 on each side of lateral stamen, median glands present or absent.

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.

divaricate, slender.

silicles, sessile, oblong, elliptic, obovoid [ovoid, suborbicular, lanceoloid], keeled, angustiseptate;

valves each with prominent midvein, glabrous;

replum rounded;

septum complete;

ovules [4–]10–24 per ovary;

style usually obsolete (rarely to 0.5 mm);

stigma capitate.

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

ovules 4–100[–numerous] per ovary;

style usually distinct, sometimes obsolete or absent;

stigma entire.

biseriate or aseriate, plump, not winged, oblong;

seed coat (obscurely reticulate) mucilaginous or not when wetted;

cotyledons incumbent, rarely accumbent.

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

cotyledons usually incumbent, rarely accumbent.

= 6.