Flora of North America species comparison

blade margins entire.

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

not or somewhat secund, usually dense and compact, sometimes slightly elongated in fruit.

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

usually sigmoid.

usually sigmoid.

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

valves glabrous inside;

septum complete;

ovules 8–16 per ovary;

style to 7 mm.

slightly wider than long, apex truncate or retuse;

valves pubescent inside;

septum ± perforate;

ovules 4(–8) per ovary;

style to 7(–9) mm.

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

yellow.