Flora of North America species comparison

to 12 pairs, usually approximate to overlapping, slightly ascending, distance between 1st and 2d pinnae not or slightly more than between 2d and 3d pairs, lanceolate, divided to tip.

to 6 pairs, ascending, usually approximate or overlapping except in shade forms, distance between 1st and 2d pinnae not or slightly more than between 2d and 3d pairs, basal pinna pair commonly much larger and more divided than adjacent pair, lobed to tip, basal pair oblong to oblong-lanceolate with lobed margins, remainder broadly spatulate with entire margins or 1 or more shallow lobes, apex rounded, venation pinnate.

sessile;

blade pale green, 3–4-pinnate, to 25 × 33 cm, thin, herbaceous.

stalk 0–3(–10) mm, to 1/4 length of trophophore rachis;

blade ± gray-green, dull, oblong-linear to deltate, 1–2-pinnate, to 6 × 5 cm, firm.

lanceolate and deeply lobed, lobes linear, serrate, apex pointed, venation pinnate, midrib present.

2-pinnate, 0.5–1.5(–2) times length of trophophore.

1–3 pinnate, 2–3 times length of trophophore.

=184.

=180.