Flora of North America species comparison

usually becoming ± prostrate, sometimes ascending to erect, often flagelliform, often rooting at nodes, lateral or central to persistent or ephemeral basal rosettes, 0.3–12+ dm, lengths (1–)2–10+ times basal leaves.

soon becoming prostrate, flagelliform, not branched, rooting at some nodes, 1.5–10+ dm.

basal and cauline not in ranks;

cauline (proximal to flowering and/or branching nodes) 0–3(–7);

primary leaves ternate or palmate, 2–20(–30) cm;

petiole: long hairs appressed to spreading, weak to stiff, glands absent or sparse, sometimes common;

leaflets 3–5(–7), at tip of leaf axis, separate to slightly overlapping, obovate to narrowly elliptic, cuneate, or oblanceolate, margins flat or slightly revolute, distal 1/2–3/4 evenly incised 1/4–1/2 to midvein, teeth 2–13 per side, surfaces similar to ± dissimilar, abaxial usually green, sometimes silvery white, cottony hairs absent, adaxial green, not glaucous, long hairs usually ± stiff, sometimes weak or absent.

persistent, usually palmate, 3–12(–30) cm;

petiole 2–10(–25) cm, long hairs sparse to abundant, tightly to loosely appressed, 0.5–1.5 mm, usually stiff, sometimes weak, glands absent;

leaflets (3–)5(–7), central oblanceolate to obovate, (0.5–)2–4(–7) × 0.3–1.5(–2.5) cm, distal ± 3/4 of margin incised 1/4–1/3 to midvein, teeth (3–)4–12 per side, surfaces similar, green, sparsely to moderately hairy.

2–3(–4) proximal to 1st flowering node, usually well expanded at anthesis, usually palmate, 2–8(–20) cm;

petiole 0.5–6(–15) cm;

leaflets (3–)5, ± resembling those of basal leaves, apex rounded to obtuse.

solitary flowers at stolon nodes or 3–30-flowered, cymose, open.

solitary flowers at stolon nodes.

straight or slightly curved in fruit, (1–)2–12(–17) cm, proximal not longer than distal.

(2.5–)4–12(–15) cm.

4–5(–10)-merous;

hypanthium 1.5–5(–7) mm diam.;

petals usually bright yellow, rarely cream, ± obcordate or obovate to round, (2–)4–9(–12) mm, usually longer than sepals, apex rounded to retuse;

stamens 15–20;

styles subapical, columnar-clavate to ± filiform, not papillate-swollen proximally, 0.6–1.5 mm.

5(–10)-merous;

epicalyx bractlets elliptic or oblong to ovate, 4–10 × 1.5–3.5 mm, often much larger than sepals (especially in fruit);

hypanthium 4–7 mm diam.;

sepals (3–)5–7 mm, apex broadly acute to obtuse;

petals 7–9(–12) × 6–9(–11) mm, apex usually ± retuse;

stamens ca. 20, filaments (0.5–)1–2.5(–2.8) mm, anthers (1–)1.3–2 mm;

carpels 60–120, styles 0.6–1.3 mm.

smooth or rugose.

1.3–1.6 mm, ± rugose.

erect, slender to stout, 2–6+ cm.

= 28 (Eurasia).