Flora of North America species comparison

decumbent to ascending, rarely erect, 1–5 dm.

petiole 1–4 cm, eglandular hairs absent or sparse, spreading, less than 1 mm, weak, glands abundant.

subpinnate, 7–22(–25) cm;

petiole 3–12(–15) cm, long hairs ± abundant, appressed to ascending, 0.5–3 mm, stiff, short hairs absent, cottony or crisped hairs absent, glands absent or sparse;

leaflets 3(–4) per side, on distal 1/5–1/3(–1/2) of leaf axis, overlapping or not, terminal ones oblong to broadly oblong, 1.5–5 × 0.7–2 cm, margins strongly revolute, incised nearly to midvein, undivided medial blade 1–3 mm wide, teeth (3–)4–5 per side, linear, rarely narrowly oblong to narrowly lanceolate, surfaces strongly dissimilar, abaxial white or grayish white, long hairs abundant, ± 1 mm, stiff verrucose on veins, sparse and soft between veins, short hairs absent, crisped and cottony hairs dense, glands absent, adaxial dark green, long hairs sparse to common, tightly appressed, 0.5–1 mm, short hairs absent, cottony and crisped hairs absent, glands absent or sparse.

(1–)2–3.

(5–)10–40+-flowered, ± congested to open.

0.3–1 cm (proximal to 3 cm).

epicalyx bractlets lanceolate-elliptic to ovate, 2–4 × 0.8–2 mm;

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

petals 3.5–6.5 × 3–5 mm;

filaments 1–2.5 mm, anthers 0.5–0.6 mm;

carpels 10–15.

epicalyx bractlets linear to narrowly oblong-lanceolate, 3–5 × 0.9–1.3 mm, lengths ± 3/4 times sepals, margins flat;

hypanthium 2.5–3.5 mm diam.;

sepals 4–7(–8) mm, apex acute to obtuse, abaxial surfaces: venation prominent at least proximally, glands ± sparse, obscured to evident;

petals pale yellow, 3.5–5 × 3–5 mm, lengths ± equal to sepals;

filaments 0.5–1.5 mm, anthers 0.5–0.6 mm;

carpels 40–60, styles papillate-swollen at very base, if at all, 0.8–0.9 mm.

1–1.5 mm.

1.3–1.5 mm, rugose.

= 28.