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 or somewhat secund, usually dense and compact, sometimes slightly elongated in fruit.

usually sigmoid.

usually 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;

ovules 8–16 per ovary;

style to 7 mm.

yellow.

usually yellow, sometimes cream-yellow, cream-white, or white.