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.

not secund, fairly dense in fruit.

usually sigmoid.

straight (nearly erect), or 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 complete or 1/3–1/2 perforate;

ovules 4–8 per ovary;

style 6–9 mm.

yellow.

yellow.