Flora of North America species comparison

(0.8–)1–2.5(–3.5) dm.

ascending to erect, (0.4–)1–2 dm, lengths 2–4 times basal leaves.

usually palmate with additional lateral leaflets, sometimes pinnate, 3–10(–14) cm;

petiole 1.5–5 cm, vestiture seasonally dimorphic, long hairs abundant, spreading on first-formed leaves, tightly appressed to ascending on later-formed leaves, 1–2 mm, ± stiff (especially on later-formed leaves), cottony and crisped hairs usually absent, glands absent or sparse;

leaflets (3–)5 at tip of leaf axis plus 1(–2) additional pair(s) separated from tip by 3–20 mm, on distal 1/10–1/3(–1/2) of leaf axis, largest leaflets oblanceolate-oblong, (0.5–)1.5–2.5(–3) × 0.3–1 cm, ± whole margin incised 1/2–2/3(–3/4) to midvein, teeth (2–)4–9 per side, usually touching to strongly overlapping, sometimes separate, 2–6 mm, surfaces usually strongly dissimilar (less so on first-formed leaves), abaxial usually white, straight hairs ± abundant (mostly on veins), 1–2 mm, cottony or crisped/cottony hairs ± dense (sparser on first-formed leaves), glands absent or obscured, adaxial green (to grayish), straight hairs sparse to common, 0.5–1.5 mm, cottony and crisped hairs absent, glands sparse.

not in ranks, ternate, (1–)2–5(–7) cm;

stipules: apex acute to rounded;

petiole 1–4 cm, hairs absent or long hairs sparse to common, appressed, 0.5–1 mm, stiff, glands absent;

leaflets 3, central obovate to flabellate, 1–2.5 × 0.5–2 cm, petiolule (1–)3–10 mm, margins flat, not lobed, distal 1/2–3/4 ± evenly incised 1/4–1/2 to midvein, teeth (2–)3(–4) per side, not secondarily toothed, surfaces similar, green, sometimes ±glaucous, hairs absent or sparse to common, 0.5 mm, glands absent.

1–3.

3–20(–30)-flowered.

1–6-flowered.

0.5–2 cm (proximal to 3 cm).

straight, 0.5–2 cm in flower, to 5 cm in fruit.

epicalyx bractlets narrowly to broadly lanceolate, 2–5(–6) × 1–1.5 mm;

sepals 4–7 mm, apex acute to acuminate;

petals 4–8 × 4–8 mm;

filaments (0.5–)1–2 mm, anthers 0.3–0.8 mm;

carpels 15–30, styles filiform to filiform-tapered, ± papillate-swollen in less than proximal 1/5, 1.5–2 mm.

epicalyx bractlets elliptic to oval, 2–4.5 × 1–2 mm, margins flat;

hypanthium 2.5–4 mm diam.;

sepals 3–5.5 mm, apex acute to obtuse;

petals yellow, 4–7 × 4–6 mm;

filaments 1–3 mm, anthers 0.5–0.9 mm;

carpels 10–30, styles filiform, not or slightly papillate-swollen proximally, 1–2.5 mm.

1.2–1.6 mm.

1.2–1.5 mm.