Flora of North America species comparison

blade margins entire.

blade margins sinuate or lobed, or, sometimes, lyrate.

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

not secund, elongated and loose in fruit.

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 fenestrate;

ovules 4–6 per ovary;

style to 9 mm.

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

yellow.

= 10.