Flora of North America species comparison

(tuberiform, fragile), 4–9(–11) mm diam., (fleshy).

absent.

erect or decumbent at base, unbranched, 2–6(–7.5) dm.

erect, ascending, or decumbent, unbranched or branched basally and/or distally, (0.3–)1–3.5(–4.5) dm, (not flexuous).

(persistent to anthesis), rosulate, (5–)8–15(–22)-foliolate, (2–)3.5–15(–17) cm, leaflets petiolulate;

petiole 0.5–5 cm, (ciliate);

lateral leaflet blade oblong, ovate, obovate, or orbicular, smaller than terminal, margins entire, repand, crenate, or 3-lobed;

terminal leaflet (petiolule 0.2–1 cm), blade reniform or orbicular, 0.4–2 cm × 6–30 mm, margins entire, repand, dentate, or 3 or 5-lobed.

5–13-foliolate, (4–)10–18(–25) cm, leaflets petiolulate or subsessile;

petiole (3–)5–12(–17) cm;

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

terminal leaflet (petiolule 0.4–0.7 cm), blade oblong to elliptic or ovate, (0.4–)0.7–1.7(–2) cm, base cuneate or obtuse, margins entire or obscurely 3-lobed.

2–6, 5–11-foliolate, petiolate, leaflets petiolulate or sessile;

petiole 3–10 cm, base not auriculate;

lateral leaflets sessile, blade similar to terminal, smaller;

terminal leaflet (petiolule 0.5–1.5 cm), blade narrowly ovate or oblong to oblanceolate, 1.5–3.5 cm × 2–15 mm, margins entire or toothed to 3-lobed.

1–4(–6), compound as basal, petiolate, [(0.5–)1.2–5.5(–7) cm, including petiole], leaflets petiolulate;

blade base not auriculate;

leaflets similar to basal.

ebracteate.

ebracteate.

sepals oblong to ovate, 3.5–5 × 1.8–2.5 mm, lateral pair saccate basally;

petals white, obovate, 12–16 × 6–8 mm, (not clawed, apex rounded or subemarginate);

filaments: median pairs 6–7 mm, lateral pair 4–5 mm;

anthers oblong, 1.5–1.8 mm.

sepals oblong, 1.5–2.5 × 0.3–0.7 mm, lateral pair not saccate;

petals (sometimes absent) white, spatulate, 2.5–4.5(–5) × 0.5–1.1 mm; (stamens usually 4, lateral pair often absent, rarely 5 or 6);

filaments 1.8–3 mm;

anthers ovate, 0.3–0.5 mm.

ascending to divaricate, (10–)20–40(–60) mm.

erect to ascending, (2–)3–10(–14) mm.

linear, 2.5–4.5 cm × 1.4–2 mm;

ovules 12–24 per ovary;

style 4–6 mm.

linear, (torulose), (0.9–)1.5–2.5(–2.8) cm × (0.8–)1–1.4 mm, (often appressed to rachis);

ovules 14–40 per ovary;

style 0.1–0.6(–1) mm.

brown, oblong, 1.8–2 × 1–1.5 mm.

light brown, oblong or subquadrate, 0.9–1.3(–1.5) × 0.6–0.9(–1.1) mm, (narrowly margined).

= 16.