Flora of North America species comparison

slender, to 2 mm diam.

absent.

usually procumbent, sometimes erect, (not flexuous), unbranched or branched, (1–)1.5–3(–5) dm.

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

(soon withered), not rosulate.

(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.

absent.

simple, petiolate;

petiole (0.3–)0.5–2.5(–4) cm, base not auriculate;

blade oblong, ovate, suborbicular, or cordate, (0.5–)1–4.5(–5.5) cm × (5–)10–40(–54) mm, base cordate, rounded, or truncate, margins entire, repand, or sinuate, (distally with shorter petiole, blade smaller).

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, 2–3 × 1–1.7 mm, lateral pair not saccate basally;

petals white, broadly oblanceolate, spreading, 5–7(–8) × 2–3 mm, (not clawed, apex rounded);

filaments: median pairs 3.5–4.5 mm, lateral pair 2.7–3.5 mm;

anthers oblong, 0.8–1.2 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 to ascending, (6–)10–15(–20) mm.

divaricate or ascending, 4–10 mm.

linear, (torulose), 1–1.5(–2) cm × 0.8–1.1 mm;

ovules 40–80 per ovary;

style 1.5–2.5 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 to ovoid, 0.9–1.1 × 0.5–0.6 mm.

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

= 16.