Flora of North America species comparison

cylindrical, slender, 0.8–1.5 mm diam.

(unsegmented), cylindrical, 2–10 mm diam., (somewhat uniform, fleshy, not fragile, with dentate leaf scars).

prostrate to decumbent or erect, unbranched or branched, 0.5–4(–6) dm.

erect, unbranched, (1.2–)1.5–3.5(–4) dm, rarely sparsely pubescent distally.

absent.

3-foliolate, (5.5–)8–22(–26) cm, leaflets petiolulate or subsessile;

petiole (3–)4.5–16(–20) cm;

lateral leaflets subsessile or petiolulate, blade often similar to terminal, base sometimes oblique;

terminal leaflet (petiolule 0.5–1.2 cm), blade ovate-elliptic to broadly ovate, (2–)3.5–8(–10) cm × (5–)20–65(–80) mm, base cuneate to obtuse, margins coarsely crenate or dentate, (surfaces puberulent, trichomes to 0.1 mm).

3–10, usually simple, rarely 3 or 5-foliolate, petiolate;

petiolulate or sessile;

petiole 0.4–2.5 cm, base not auriculate;

lateral leaflets (when present) sessile or petiolulate (to 0.2 cm), blade similar to terminal, considerably smaller;

terminal leaflet blade orbicular to reniform or ovate to oblong, 0.4–3 cm × 3–20 mm, (somewhat fleshy), base subcordate to rounded or subtruncate, margins entire or repand, rarely undulate, (apex rounded).

2 (or 3) [(sub)opposite], 3-foliolate, (similar to rhizomal leaves), petiolate, leaflets petiolulate or subsessile;

petiole (1–)2–4.5 cm, base not auriculate;

lateral leaflets similar to terminal;

terminal leaflet subsessile or petiolulate (0.2–1 cm), blade broadly elliptic to ovate, (2–)4–8(–10) cm × 10–50 mm, margins coarsely dentate or crenate, (margins minutely puberulent).

ebracteate.

ebracteate.

sepals ovate, 0.7–1.2 × 0.5–0.7 mm, lateral pair not saccate basally;

petals absent or rudimentary, to 0.7 mm;

filaments 0.5–0.8 mm;

anthers ovate, 0.1–0.2 mm.

sepals oblong, (4–)5–8 × 2–3 mm, lateral pair slightly saccate basally;

petals white or pink to purple, obovate to oblanceolate, (7–)9–15(–17) × (3–)4–7 mm, (short-clawed, apex rounded);

filaments: median pairs 5–8 mm, lateral pair 3.5–6 mm;

anthers linear to oblong, 2.5–3 mm.

divaricate-ascending to spreading, 0.5–2(–4) mm.

ascending to divaricate, (10–)15–30(–36) mm.

narrowly oblong to linear, (3–)5–10(–15) × 0.8–1.2 mm;

ovules 6–22 per ovary;

style 0.2–0.5(–1) mm.

linear-lanceolate, 1.5–4 cm × 1.5–2.5 mm;

ovules 10–14 per ovary;

style 4–8(–10) mm.

light or yellowish brown, oblong or ovoid, 1–1.4 × 0.7–1 mm.

(rarely produced) brown, oblong, 2–2.2 × 1.2–1.5 mm (cotyledons incumbent).

= 96.