Flora of North America species comparison

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.

to 5 pairs, spreading, well separated, distance between 1st and 2d pinnae not or slightly more than between 2d and 3d pairs, basal pinna pair approximately equal in size and cutting to adjacent pair, broadly fan-shaped, undivided to tip, margins mainly crenulate to dentate, proximal pinnae with 1 or more shallow incisions, apex rounded, apical lobe linear to linear-cuneate, well separated from adjacent lobes, venation like ribs of fan, midrib absent.

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.

stalk 0.5–7 mm;

blade yellow-green, oblong, 1-pinnate, to 6 × 2 cm, thin, herbaceous.

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

1–2-pinnate, 1.3–3 times length of trophophore.

=180.

=90.