Flora of North America species comparison

absent.

(tuberiform, fragile), ovoid or globose at base of stem, 3–10 mm diam., (fleshy).

erect, ascending, or decumbent, branched or unbranched, (0.6–)1–5 dm, (slightly flexuous).

(simple from base), erect to ascending, (not flexuous), unbranched or branched distally, 1–5 dm, glabrous or pubescent proximally.

(often withered by anthesis), not rosulate, 5–15-foliolate, (2.7–)4–14(–19) cm, leaflets petiolulate;

petiole 0.7–5 cm, (ciliate or not);

lateral leaflet blade oblong, ovate, or elliptic, smaller than terminal, margins entire, repand, crenate, or 3 (or 5)-lobed;

terminal leaflet (petiolule 0.3–1.7 cm), blade reniform, broadly ovate, or suborbicular, 0.5–2.5 cm × 4–30 mm, margins repand, crenate, or 3 or 5-lobed.

not rosulate, pinnately compound, (3 or) 5 (or 7)-foliolate, 2–10 cm, leaflets petiolulate or subsessile;

petiole 0.5–6.5 cm;

lateral leaflets petiolulate or subsessile, blade similar to terminal, ovate, smaller, margins entire;

terminal leaflet (petiolule 0.03–0.18 cm), blade orbicular to broadly ovate or subcordate, 0.5–2 cm × 7–25 mm, base cordate to rounded, margins entire or repand, (surfaces glabrous).

3–15, 5–15-foliolate [leaves (2–)3.5–5.5(–7) cm, including petiole], petiolate, leaflets petiolulate;

petiole base not auriculate;

lateral leaflets similar to basal, (0.4–2.5 mm wide).

3–7, (3 or) 5 or 7-foliolate (middle ones 5 or 7-foliolate, smaller distally, becoming 3-foliolate), petiolate;

petiole 0.5–3 cm, base not auriculate;

lateral leaflets similar to terminal, smaller;

terminal leaflet blade obovate to oblanceolate, 0.5–2.6 cm × 3–13 mm, margins shallowly toothed, entire, or repand.

ebracteate.

ebracteate.

sepals oblong, 1.5–2.5 × 0.7–1 mm, lateral pair not saccate basally;

petals white, spatulate, 2.5–4(–5) × 1–1.7 mm; (stamens rarely 4, lateral pair absent);

filaments 2–3 mm;

anthers ovate, 0.3–0.5 mm.

sepals oblong, 1.7–2 × 1–1.2 mm, lateral pair not saccate basally;

petals white, oblanceolate, 4–6 × 1.5–2 mm, (not clawed);

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

anthers ovate, 0.3–0.5 mm.

divaricate or ascending, (5–)6–14(–17) mm.

divaricate-ascending, 7–18 mm.

linear, (torulose), (0.8–)1.2–2.8 cm × 1–1.5 mm;

ovules 18–40 per ovary;

style 0.3–1(–1.5) mm.

linear, (torulose), 1.5–3.3 cm × 1.7–2.2 mm; (valves glabrous or sparsely pubescent);

ovules 18–40 per ovary;

style 0.5–1.5 mm.

brown, oblong or subquadrate, 0.9–1.5 × 0.6–1 mm, (narrowly margined or not).

brown, ovoid, 1–1.6 × 1–1.2 mm.

= 32.

= 64.