Flora of North America species comparison

stout, usually columnar, sometimes sheathed with marcescent whole leaves.

erect, (0.2–)0.3–1.5(–2) dm, lengths 1.5–2.5(–3.5) times basal leaves.

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

(1–)2–10(–15) cm;

petiole (0.5–)1–5(–12) cm, long hairs common to dense, ± ascending to loosely appressed, sometimes spreading, 1–2 mm, ± soft, smooth, crisped/short-cottony hairs usually sparse, sometimes absent or common, glands absent, sparse, or obscured;

leaflets separate to slightly overlapping, central obovate or obtriangular, (0.5–)1–2(–3) × (0.4–)0.8–1.5(–2) cm, sessile or subsessile, base cuneate, margins revolute, distal (1/3–)1/2–2/3(–3/4) incised 1/2–2/3(–3/4) to midvein, teeth 2–3(–4) per side, usually ± distant, surfaces somewhat to more often strongly dissimilar, abaxial yellowish or grayish white to white, long hairs 0.8–1.5 mm, cottony-crisped hairs ± dense, adaxial green to grayish green, long hairs sparse to ± abundant, other hairs usually absent.

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.

(0–)1(–2).

(1–)2–3.

usually 1(–2)-flowered, rarely to 5-flowered.

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

(0.5–)2–4 cm in flower, to 5 cm in fruit.

0.3–1 cm (proximal to 3 cm).

epicalyx bractlets elliptic-lanceolate to ovate, (3–)4–6(–7) × (0.8–)1.2–2(–2.5) mm, (1/2–)2/3 to as wide as sepals, margins revolute, rarely flat, red glands absent;

hypanthium 2.5–4 mm diam.;

sepals 4–6(–7) mm, apex subacute;

petals (5–)6–9 × (5–)7–9 mm, significantly longer than sepals;

filaments 1–1.3 mm, anthers 0.4–0.6 mm;

carpels 30–40, apical hairs absent, styles narrowly columnar to conic-tapered, papillate-swollen on proximal 1/5(–1/3), 0.9–1.1 mm.

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.

1.2–2 mm.

1.3–1.5 mm, rugose.

= 28, 42, 49, 56 (Russian Far East).

= 28.