Flora of North America species comparison

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

decumbent to nearly erect, (0.2–)0.5–2.6 dm.

± 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.

subpinnate to subpalmate, 1.5–10(–17) cm;

petiole 0.5–4(–8) cm, long hairs ± abundant, spreading to loosely appressed, 0.5–2 mm, weak to stiff, short hairs absent or sparse, cottony or crisped hairs absent, glands sparse to abundant;

leaflets (1–)2–3 per side, on distal 1/6–1/3(–1/2) of leaf axis, separate to slightly overlapping, terminal ones oblanceolate-elliptic to narrowly obovate, (0.5–)1–2.5(–3.5) × 0.4–1(–1.3) cm, margins strongly revolute, incised 3/4+ to midvein, undivided medial blade 1.5–3(–5) mm wide, teeth (2–)3–5(–6) per side, ± linear-elliptic to rarely ovate or oblanceolate, surfaces ± dissimilar, abaxial ± grayish, rarely white, long hairs ± abundant especially on veins, 1 mm, weak, short hairs absent or sparse, cottony hairs absent, crisped hairs sparse to abundant, glands ± abundant, sometimes obscured, adaxial green to gray-green, long hairs sparse to abundant, loosely appressed, 0.5–1(–2) mm, short hairs absent or sparse, cottony and crisped hairs absent, glands ± abundant.

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.

1–2.

solitary flowers at stolon nodes.

(1–)3–12(–20)-flowered, congested, scarcely opening in fruit.

(1–)3–10(–17) cm.

0.2–0.5 cm (proximal to 1.2 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 elliptic to linear, 1.5–3 × (0.3–)0.5–1.2 mm, lengths 1/2–3/4 times sepals, margins flat;

hypanthium 2.5–5 mm diam.;

sepals 2–5 mm, apex usually ± acute to obtuse, rarely acuminate, abaxial surfaces: venation faint, glands abundant, evident;

petals pale yellow, 2–5 × 2–4 mm, lengths ± equal to sepals;

filaments 0.5–2 mm, anthers 0.3–0.7 mm;

carpels 20–60, styles papillate-swollen in proximal 1/2–3/4+, 0.8–1.2 mm.

1–1.5(–1.8) mm, ± smooth.

1 mm, smooth to faintly rugose.

± erect, stout to slender, 1–4 cm.

= 28, 56 (Europe).