Flora of North America species comparison

erect or subdecumbent, unbranched or branched.

basal and cauline;

petiolate, sessile, or subsessile;

basal (withered by fruiting), loosely rosulate or not;

petiolate [subsessile], blade margins entire or obscurely dentate;

cauline blade (base cordate to amplexicaul), margins entire or repand.

(several-flowered), considerably elongated in fruit.

sepals ovate or oblong, (margins membranous);

petals white, oblong or spatulate, (sometimes slightly unequal), claw (short or) undifferentiated from blade, (apex rounded [obtuse]);

stamens slightly tetradynamous;

filaments not dilated basally;

anthers ovate, (apex obtuse);

nectar glands (2 or 4), lateral, 1 on each side of lateral stamen (when 4).

divaricate, straight or recurved, slender.

sessile, usually obcordate, rarely obovate, (apex emarginate), strongly angustiseptate;

valves keeled, (winged around, much wider apically);

replum rounded;

septum complete, (not veined);

ovules (4–)6–8(–10) per ovary;

style obsolete or distinct, (included in apical notch of fruit);

stigma capitate.

plump, not winged, ovoid;

seed coat (smooth), mucilaginous when wetted;

cotyledons accumbent.

= 7.