Flora of North America species comparison

not sheathed with marcescent whole leaves.

mostly decumbent to ascending, 1–6 dm.

decumbent to ascending, 0.5–2(–2.5) dm.

palmate.

subpalmate, (2–)3–8 cm;

petiole 1–4 cm, long hairs sparse to abundant, ascending to spreading, 0.5–2.5 mm, weak to ± stiff, scarcely to ± verrucose, short-crisped hairs abundant, cottony hairs absent, glands sparse to common;

leaflets (3–)5(–7), proximalmost separated by 1–5 mm, central narrowly obovate-elliptic, (1–)1.5–2.5(–3) × 0.8–1.5 cm, petiolules 0–1 mm, distal 3/4 to whole margin incised 2/3–3/4 to midvein, teeth 5–7 per side, (2–)3–6 mm, apical tufts 0.5–1 mm, abaxial surfaces grayish white to white, long hairs abundant, cottony-crisped hairs usually dense, short hairs and glands absent or sparse, adaxial grayish green, long hairs common to abundant, 1–2 mm, ± stiff, short-crisped hairs abundant, cottony hairs absent, glands sparse to common.

2–9, proximal ones 2–7(–10) cm;

proximal petioles 1–4(–7) cm, long hairs absent or sparse, ± ascending, 1–2 mm, soft, short and crisped hairs absent or obscured, cottony hairs dense, glands absent or obscured;

leaflets 5(–7), central one ± oblanceolate, (0.5–)1–3 × 0.3–1(–1.3) cm, margins revolute, distal 1/2–2/3 evenly or unevenly incised 1/2–3/4+ to midvein, teeth 2–3 per side (more if lobed or secondarily toothed), surfaces strongly dissimilar, abaxial white, long hairs ± sparse (mostly on veins), 1–2 mm, weak, short and crisped hairs absent or obscured, cottony hairs dense, glands absent or obscured, adaxial long hairs absent or sparse to common, short or crisped hairs absent or sparse, cottony hairs absent, glands absent or sparse.

1–2.

10–80-flowered.

(3–)5–10-flowered, congested or ± elongating in fruit, branch angle 10–30°.

0.3–1.5(–2) cm.

0.2–1 cm, proximal to 1.5 cm.

epicalyx bractlets oblong to narrowly ovate, 1.5–3 × 0.7–1.2 mm, lengths 2/3–1 times sepals;

sepals 2–4.5 mm, apex ± acute;

petals (2–)2.5–4 × 1.5–3 mm;

filaments 0.8–1.5 mm, anthers 0.3–0.6(–0.8) mm;

carpels 30–60, styles 0.6–0.9 mm, often strongly papillate-swollen proximally.

epicalyx bractlets ± lanceolate, (2–)3–5(–6) × 0.5–1.5 mm;

hypanthium 3.5–5 mm diam.;

sepals 4–6 mm, apex narrowly acute, glands ± common, only partly obscured;

petals yellow, ± overlapping, (4–)5–6 × 4.5–5.5 mm, longer than sepals;

filaments 0.5–2 mm, anthers 0.7 mm;

carpels 50–70, styles 1.2–1.5 mm.

0.8–1.1 mm, smooth to lightly rugose.

1.3 mm.

= 14, 28, 35, 42, 56, 62 (Eurasia).