Flora of North America species comparison

ascending to erect, 3–5 dm.

ascending to erect, (1.8–)2–6(–6.5) dm.

8–20 cm; sheathing base ± strigose abaxially;

stipules linear to narrowly lanceolate, 3–5 mm;

petiole 1–3.5 cm, hairs abundant, ascending to spreading, 1–2 mm;

leaflets 35–50 per side, loosely overlapping, 2–6 mm, lobes 3–5, oblanceolate to obovate or oval, hairs abundant, ± ascending, 1–2(–3) mm.

7–25(–30) cm; sheathing base usually sparsely strigose abaxially;

petiole 1–4(–5) cm;

leaflets 15–40 per side, ± flabellate, 3–14 mm, usually incised to base into 2–3 oblanceolate lobes, ± densely short-hirsute to -villous.

5–10.

10–100-flowered, (1.5–)5–15 cm diam., flowers usually arranged individually, sometimes more congested.

10–60-flowered, 4–15 cm diam.

(1–)2–10 mm.

(1–)5–20 mm.

8–13 mm diam.;

epicalyx bractlets linear-lanceolate to lanceolate, (1.8–)2–2.5 mm;

hypanthium cupulate to turbinate, 1.5–3 × 2.5–4 mm, often nearly as deep as wide;

sepals often purple-suffused or -mottled, (2.5–)3–5 mm, acuminate;

petals white, becoming pink-tinged with age, oblanceolate to narrowly spatulate, (2.8–)3–5(–6) mm;

stamens 20, filaments filiform, 1.5–2.3 mm, anthers white to cream, 0.3–0.6 mm;

carpels 2–4, styles 2.5–3.5 mm.

9–14 mm diam.;

epicalyx bractlets lanceolate, 1–3(–3.3) mm;

hypanthium interior golden, 1–2 × 3–5 mm;

sepals (2.5–)3.5–6 mm, base golden adaxially, apex acute to acuminate;

petals yellow, linear to narrowly oblanceolate, 2–4 mm;

stamens 5, filaments 2–4 mm, anthers yellow, sometimes red-rimmed, oblong, 0.6–1.2 mm;

carpels 1–5, styles 2–3 mm.

dark brown, 2.5–3 mm.

brown, 1.7–2.2 mm.