Flora of North America species comparison

4–28 cm, glabrous or downy, hairs to 1 mm, sometimes septate-glandular.

2–30 cm, densely pilose, hairs 2–5 mm.

basal 3–13 cm, blade pinnate to interruptedly pinnate, major leaflets 13–26, alternating with 0–14 minor ones, terminal leaflet slightly larger than major laterals;

cauline 0.7–2 cm, stipules adnate to leaf, indistinguishable from pair of lobes, blade bractlike, not resembling basal, alternate, simple, pinnatifid to 3-fid.

basal 3–10 cm, blade pinnate-pinnatifid, leaflets/lobes 11–23, terminal leaflet slightly larger;

cauline 1.4–2.5 cm, stipules adnate to leaf, indistinguishable from lobes, blade bractlike, not resembling basal, alternate, simple, 3-fid.

1–3(–4)-flowered.

1-flowered.

woolly, sometimes glandular.

densely pilose, eglandular.

erect;

epicalyx bractlets 1.5–7 mm;

hypanthium green, slightly purple-tinged to strongly purple;

sepals erect to erect-spreading, 3–10 mm;

petals spreading, yellow, obovate to nearly orbiculate, 5–12(–17) mm, longer than sepals, apex broadly rounded to irregularly emarginate.

erect;

epicalyx bractlets 6–9 mm;

hypanthium green;

sepals spreading-erect, 7–14 mm;

petals 5–9, spreading, yellow, obovate, orbiculate, or ovate, 10–20 mm, longer than sepals, apex rounded to emarginate.

sessile, glabrous.

sessile, silky.

wholly persistent, not geniculate-jointed, 2–5(–10) mm, apex not hooked, glabrous throughout or pilose only at base.

wholly persistent, not geniculate-jointed, 18–30 mm, apex not hooked, pilose except distal 1–3 mm.

= 56.

= 28.