Flora of North America species comparison

pendent or prostrate to ascending, (0.5–)1–2 dm.

decumbent to ascending, 1–3.5 dm.

planar, (2–)5–15 cm; sheathing base not strigose abaxially;

petiole 1–5 cm;

lateral leaflets (1–)2–3(–4) per side, separate, obovate to orbiculate, 5–20 mm, incised 1/4–1/2 to base into 5–9 broadly ovate teeth, apex not setose, surfaces short-pilose, ± glandular;

terminal leaflets distinct.

(3–)5–15(–18) cm; sheathing base glabrous or sparsely strigose abaxially;

stipules ± lanceolate, 2.5–5 mm;

petiole (0.3–)0.5–6(–8) cm, hairs sparse to abundant, appressed-ascending, 1–2 mm;

leaflets 15–20 per side, loosely overlapping, 2–10 mm, lobes 2–5, oblanceolate, hairs sparse to abundant, spreading to ascending, 1–2 mm.

(0–)2;

blade well developed.

3–4.

(1–)3–20(–35)-flowered, open, (0.5–)1.5–4(–6) cm diam.

5–20(–40)-flowered, (1–)1.5–2.5(–4) cm diam., flowers arranged in 1–few ± tight glomerules of 10–15 flowers.

5–20(–30) mm.

1–4 mm.

7–10 cm diam.;

epicalyx bractlets 0;

hypanthium patelliform, 0.5(–1) × 2–3 mm;

sepals 2–4 mm, broadly acute;

petals yellow, narrowly oblanceolate, 2–3 mm;

stamens 5–10, filaments 0.6–1.2(–1.5) mm, anthers yellow, oblong, 0.8–1 mm;

carpels 4–10, styles 1.5–2 mm.

7–10 mm diam.;

epicalyx bractlets linear to oblong, 1–2(–2.5) mm;

hypanthium campanulate, 1–2 × 2.5–4 mm, ± 1/2 as deep as wide;

sepals green, 2–3(–3.5) mm, acute;

petals 4(–5), light yellow, oblanceolate to spatulate or narrowly obovate, 3–4 mm;

stamens 12–16 (4-merous flowers) or 16–20 (5-merous flowers), filaments filiform, 0.6–1.1 mm, anthers yellowish, 0.3–0.5 mm;

carpels 4–20, styles 1.4–2 mm.

greenish white to light tan, 1.5–2 mm, faintly rugose, ± carunculate.

light brown, 1–1.5 mm.