Flora of North America species comparison

absent.

(simple from base), erect, (not flexuous), unbranched or branched distally, (0.5–)1.5–5.5(–7) dm.

(soon withered), not rosulate, similar to proximalmost cauline leaves, 4–15 cm.

(3–)5–20(–35), pinnately (5 or) 7–13(–19)-foliolate, sometimes appearing pinnatisect, lobe number similar to leaflets (middle and proximal ones 2–11 cm), petiolate, leaflets petiolulate, subsessile, or sessile;

petiole (0.4–)1–3.5(–4.5) cm, base not auriculate, (often sparsely hirsute);

lateral leaflets shortly petiolulate or sessile, (decurrent on rachis smaller than terminal, distalmost blades narrower, with fewer lobes or leaflets), margins entire or crenate;

terminal leaflet (subsessile or petiolule to 1 cm), blade suborbicular, obovate to oblanceolate, or elliptic, 1.3–3(–4) cm × 6–25 mm, base often cuneate, margins entire, repand, or obscurely 3 or 5-lobed.

ebracteate.

sepals oblong, (1–)1.3–2.3 × 0.5–1 mm, lateral pair not saccate basally;

petals white, narrowly spatulate to oblanceolate, 2–3.5(–4) × 0.8–1.5 mm, (not clawed);

filaments: median pairs 1.5–2.5 mm, lateral pair 1–2 mm;

anthers ovate, 0.2–0.3 mm.

divaricate-ascending, (3–)4–10(–13) mm.

linear, (torulose), (1.4–)1.7–2.7(–3.2) cm × 0.8–1.1 mm;

ovules 40–80 per ovary;

style 0.5–1 mm.

brown, oblong to ovoid, 0.7–1.1 × 0.5–0.8 mm.

= 32, 64.