Flora of North America species comparison

soon becoming prostrate, ± flagelliform, usually openly branched, eventually rooting at some nodes, (0.3–)1.5–7+ dm.

(0.5–)1.5–4(–5.5) dm, lengths 2–3(–4) times basal leaves.

± persistent, ternate or palmate, 2–10(–12) cm;

petiole 1–7(–8) cm, long hairs sparse to abundant, appressed, 0.5–1 mm, stiff, glands absent;

leaflets 3–5, central ± obovate to cuneate, 1–3(–3.5) × 0.8–2(–2.5) cm, distal ± 1/2 of margin incised 1/4–1/3(–1/2) to midvein, teeth 2–4 per side, surfaces similar, green, sparsely to moderately hairy.

pinnate, (3–)5–15(–25) cm;

petiole 0.5–5(–8) cm, long hairs absent to abundant, ± appressed, 1–3 mm, stiff to weak, short and crisped hairs absent or obscured, cottony hairs abundant (at least on first-formed leaves), glands sparse or obscured;

leaflets not conduplicate, lateral ones evenly to unevenly paired, 2–5(–7) per side (secondary leaflets sometimes interspersed) on distal 1/3–1/2 of leaf axis, distal pairs usually not decurrent or confluent with terminal leaflet, larger leaflets oblanceolate to narrowly obovate, 1–2.5(–3) × 0.3–1.3(–1.8) cm, distal (1/2–)2/3–3/4 (rarely more) of margin incised ± 1/2 to midvein, teeth (1–)2–9 per side, 1–4 mm, surfaces similar, gray to white or ± green, abaxial: long hairs sparse to common (at least on veins), 0.5–1.5 mm, weak to stiff, short or crisped hairs absent or sparse, sometimes obscured, cottony hairs absent or sparse to dense, glands absent, sparse, or obscured, adaxial: long hairs absent or sparse to common, short or crisped hairs absent or sparse, cottony hairs absent or sparse to abundant, glands absent or sparse.

2–3(–4) proximal to 1st flowering or branching node, usually well expanded at anthesis, usually ternate, 2–6(–10) cm;

petiole 0.3–4(–8) cm;

leaflets (3–)5, ± resembling or narrower than those of basal leaves, narrowly cuneate, 1–2(–3.5) × 0.8–2(–2.5) cm, apex rounded to obtuse.

2–6+.

solitary flowers at stolon nodes.

7–30-flowered.

(1–)3–10(–17) cm.

0.3–3 cm.

4(–5)-merous;

epicalyx bractlets narrowly elliptic to oblong or ovate, 3–4(–7) × 1–1.5 mm, smaller than to slightly larger than sepals;

hypanthium 2–4 mm diam.;

sepals (3–)4–6 mm, apex broadly acute or acuminate;

petals 6–9 × 5–9 mm, apex ± retuse;

stamens 15–20, filaments 0.8–1.2 mm, anthers 0.8–1.2 mm;

carpels 20–50, styles 0.9–1.5 mm.

epicalyx bractlets linear to narrowly lanceolate, 1–2.5(–3) × 0.3–1 mm, 1/2–2/3 as long as sepals, abaxial vestiture often much sparser than sepals, often glabrate or glabrescent distally, straight hairs absent or sparse, cottony hairs usually abundant (at least proximally), sometimes absent or nearly so (var. rupincola);

hypanthium 2–6 mm diam.;

sepals 3–6(–7) mm, apex long acuminate;

petals 4–6.5 × 4–6 mm;

filaments 1–3.5 mm, anthers 0.5–1 mm;

carpels 3–15, styles 1.5–2.1 mm.

1–1.5(–1.8) mm, ± smooth.

1.8–2.1 mm, smooth.

± erect, stout to slender, 1–4 cm.

= 28, 56 (Europe).