Flora of North America species comparison

blade margins ± entire, (sometimes slightly lobed or widened at base).

blade margins entire.

not secund, loose and elongated in fruit, or dense in alpine forms.

secund, usually elongated and loose in fruit.

usually sigmoid.

curved (recurved) or slightly sigmoid.

slightly wider than long, apex truncate or retuse;

valves pubescent inside;

septum ± perforate;

ovules 4(–8) per ovary;

style to 7(–9) mm.

as wide as or longer than wide, apex rounded-acute;

valves glabrous inside;

septum ± perforate;

ovules 4(–8) per ovary;

style 3–6 mm.

yellow.

yellow.