Flora of North America species comparison

cylindrical, 3–6 mm diam., (distinctly constricted at intervals, non-uniform diam., fleshy, slightly fragile, with dentate leaf scars).

(relatively short), 2–3 mm diam., (covered with extensive root system).

erect, unbranched, 0.9–3(–4) dm.

erect to ascending, unbranched or branched distally, 0.9–4 dm.

3-foliolate, 7–20 cm, leaflets petiolulate or subsessile;

petiole 4–15 cm;

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

terminal leaflet (petiolule 0.2–1(–1.7) cm), blade broadly ovate to oblong, 2–7.5 cm × 12–37 mm, base cuneate to obtuse, margins coarsely dentate to sharply incised, or deeply cleft into 2 or 3 lobes (lobes dentate or incised, margins puberulent).

usually 3-foliolate, rarely simple, 1–8 cm, leaflets petiolulate or subsessile;

petiole 0.5–5 cm;

lateral leaflets subsessile, often minute;

terminal leaflet (petiolule 0.4–2 cm), blade orbicular to broadly ovate, 0.5–3 cm × 5–25 mm, base rounded, margins entire, repand, or dentate.

2 or 3, 3-foliolate, (rarely subopposite), petiolate, leaflets petiolulate or subsessile;

petiole (0.5–)1–4(–6.5) cm, base not auriculate;

lateral and terminal leaflets similar to rhizomal, distalmost sometimes much smaller.

5–10, petiolate;

middle leaves often simple, petiole 0.3–1.5 cm, blade rhombic to suborbicular or ovate, 1–3.5 cm × 6–22 mm, base obtuse to cuneate, margins entire, repand, or dentate;

distal ones with shorter petiole, blade smaller.

ebracteate.

ebracteate.

sepals (erect to ascending), oblong, 5–7 × 2–3 mm, lateral pair slightly saccate basally;

petals white or pink, oblanceolate, 10–17 × 3–6 mm, (not clawed, apex rounded);

filaments: median pairs 4–8 mm, lateral pair 3–6.5 mm;

anthers linear, 1.7–2.7 mm.

sepals (ascending), oblong, 1.5–2.2 × 0.7–1 mm, lateral pair not saccate basally;

petals (somewhat spreading), white, oblanceolate, 3.5–5 × 1.2–1.8 mm, (not clawed, apex rounded);

filaments: median pairs 2.5–3 mm, lateral pair 2–2.5 mm;

anthers ovate, ca. 0.2 mm.

(flowering ones) horizontal to divaricate or deflexed, 7–20 mm.

divaricate, 9–17 mm.

(undeveloped), linear-lanceolate, to 3 cm × 2 mm;

ovules 10–14 per ovary;

style 3.5–7 mm.

linear, 0.8–1.6 cm × 0.8–1 mm;

ovules 16–22 per ovary;

style 1.2–1.8 mm.

not known.

brown, oblong to ovoid, 0.9–1.2 × 0.6–0.8 mm.

= 120, 124, 132, 138, 156, 161, ca. 208.