Flora of North America species comparison

prostrate or decumbent, or erect in emergent plants, unbranched.

cauline;

not rosulate;

petiolate;

petiole base sometimes auriculate, blade (pinnately compound in emerged plants, or simple in deeply submerged plants, lateral leaflets petiolulate or sessile, 1–6(–12) pairs), margins entire, repand, or, rarely, dentate.

(rarely absent), usually petiolate, sometimes sessile;

blade (simple or compound), base auriculate or not, margins entire or dentate to pinnately lobed.

absent or simple.

(corymbose, several-flowered), elongated in fruit.

usually ebracteate (Selenia bracteate throughout), often elongated in fruit.

sepals erect or ascending, oblong [ovate], lateral pair subsaccate or not saccate basally, (glabrous);

petals usually white, rarely pink, obovate or narrowly spatulate, (longer than sepals), claw undifferentiated from blade, (attenuate to clawlike base, apex obtuse, acute, or rounded);

stamens tetradynamous;

filaments (white), not dilated basally;

anthers oblong, (apex obtuse);

nectar glands (2), lateral, annular or semiannular.

actinomorphic;

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

petals white, yellow, pink, lilac, or purple, claw usually present, rarely absent, often distinct;

filaments unappendaged, not winged;

pollen 3-colpate.

divaricate or descending, slender, (glabrous or adaxially puberulent).

siliques, sessile, usually linear, rarely narrowly oblong, smooth or slightly torulose, straight or slightly curved, terete;

valves each obscurely veined, glabrous;

replum rounded;

septum complete;

ovules 25–50 per ovary;

style obsolete or distinct;

stigma capitate.

silicles or siliques, dehiscent, unsegmented, terete, 4-angled, or latiseptate, rarely angustiseptate;

ovules 4–300[–numerous] per ovary;

style distinct or obsolete (absent in Subularia);

stigma usually entire.

plump, not winged, oblong or ovoid;

seed coat (minutely to coarsely reticulate), not mucilaginous when wetted;

cotyledons accumbent.

biseriate or uniseriate;

cotyledons usually accumbent, sometimes incumbent.

= 8.