Flora of North America species comparison

1–2 mm diam.;

scales 2–4 mm.

usually 10–52 cm.

5–33 cm, with numerous glandular hairs distally;

scales 2–6 mm.

broadly deltate, 2–3-pinnate-pinnatifid, 5–19 cm, usually firm and robust, abaxial surface moderately to densely glandular, rachis densely glandular, adaxial surface moderately glandular.

of proximal pinnae oblong, entire to slightly crenate, apex entire, rounded.

of 2d pair usually stalked, if sessile then with basal basiscopic pinnule usually shorter than adjacent pinnule and equaling basal acroscopic pinnule;

basal acroscopic pinnule shorter than adjacent pinnule, apex often entire, rounded.;

pinnae of 3d pair usually sessile with basal basiscopic pinnule shorter than adjacent pinnule and equaling basal acroscopic pinnule;

basal acroscopic pinnule equaling or shorter than adjacent pinnule.

34–39 µm. 2n = 160.

apex acute.

pinnae 3–13 cm, ± perpendicular to rachis, basiscopic pinnules ± perpendicular to costa;

basal basiscopic pinnules either sessile or stalked, pinnate-pinnatifid or pinnatifid, if sessile then with basal basiscopic pinnulet usually shorter than adjacent pinnulet; 2d basal basiscopic pinnule sometimes stalked, if sessile then with basal basiscopic pinnulet shorter than or equaling adjacent pinnulet;

basal acroscopic pinnule sometimes stalked, if sessile then with basal basiscopic pinnulet shorter than or equaling adjacent pinnulet.