Flora of North America species comparison

cylindrical, slender, 1–3 mm diam.

absent.

erect, unbranched or rarely branched distally, (0.8–)1–2.5(–3.5) dm.

(simple or few to several from base), erect, (somewhat flexuous), often branched distally, (0.5–)1–3(–4) dm.

(often withered by anthesis), usually not rosulate, pinnately (5 or) 7–13(–17)-foliolate, (2–)4–10cm, leaflets sessile or petiolulate;

petiole 0.5–2.5(–4.5) cm;

lateral leaflets similar to terminal, sometimes smaller;

terminal leaflet (sessile or petiolule to 0.5 cm), blade linear to oblong, oblanceolate to obovate, or suborbicular, (0.1–)0.3–1 cm × 1–7 mm, base cuneate, margins entire or 3(–5)-toothed or -lobed.

simple or 3-foliolate, (1.5–)3–8 cm, leaflets petiolulate or subsessile;

petiole (1–)2–6 cm;

lateral leaflets subsessile, blade similar to terminal, much smaller;

terminal leaflet petiolulate (to 1 cm), blade reniform to cordate, (0.5–)1–2 cm, base cordate, margins entire or 3-lobed.

3–7, 3-foliolate (or distalmost simple), petiolate, leaflets petiolulate or sessile;

petiole 0.7–3.5 cm, base auriculate (auricle 0.7–5 mm);

lateral leaflets sessile or petiolulate (to 0.5 cm), blade oblong to ovate or oblong;

terminal leaflet (petiolule 0.5–1 cm), blade broadly ovate to suborbicular or reniform, 1.5–4 cm × 15–35 mm, margins often 3 or 5-lobed (lobe apex minutely apiculate, glabrous on margin).

5–10(–14), (5–)9–15(–17)-foliolate, petiolate, leaflets sessile;

petiole 0.3–1 cm, base not auriculate;

lateral leaflets similar to terminal, sometimes smaller;

terminal leaflet blade filiform, linear, or narrowly oblong, 0.3–1(–1.6) cm × 0.3–3 mm, margins usually entire, rarely 1–3-toothed.

ebracteate.

ebracteate.

sepals oblong, 2.5–3 × 1–1.5 mm, lateral pair not saccate basally;

petals white, oblanceolate, 6–8 × 2–3 mm (not clawed, apex obtuse to subemarginate);

filaments: median pairs 3.5–4 mm, lateral pair 2–2.5 mm;

anthers ovate, ca. 0.7 mm.

sepals oblong, 1–1.5(–2) × 0.3–0.5 mm, lateral pair not saccate basally, (margins membranous);

petals white, oblanceolate, (1.5–)1.8–2.5(–3) × 0.4–0.8(–1) mm;

filaments 1.4–2.5 mm;

anthers ovate, 0.2–0.4 mm.

divaricate-ascending, (7–)10–17 mm.

divaricate or ascending, 4–10 mm.

linear, (1.5–)2–3.5(–4) cm × 1.3–1.7 mm;

ovules 10–16 per ovary;

style 2–4 mm.

linear, (torulose), (0.5–)1–2(–2.5) cm × 0.6–0.9 mm;

ovules 20–50 per ovary;

style 0.3–0.7(–1) mm.

brown, oblong, 1.7–2 × 1–1.2 mm.

pale brown, oblong-ovoid, 0.6–0.9 × 0.4–0.6 mm, (narrowly margined or not).

= 16.