Flora of North America species comparison

ascending to erect, 3–5 dm.

prostrate to ascending, 0.5–1.5(–2) 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.

± tightly cylindric, 2–7(–9) cm; sheathing base glabrous abaxially;

petiole 0.5–2 cm, hairs 0.5–1 mm;

leaflets 15–20 per side, 2–4 mm, glabrate or sparsely short-hirsute, sparsely to densely glandular, lobes (2–)3–8, narrowly oblanceolate to obovate, apex not setose.

5–10.

(0–)1, not paired.

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

(5–)10–30-flowered, 1–2.5(–5) cm diam.;

glomerules 1–few.

(1–)2–10 mm.

1–7 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.

7–9 mm diam.;

epicalyx bractlets narrowly oblong to oval, 0.8–2 mm;

hypanthium shallowly cupulate, (1–)1.5–2 × 2.5–3.5 mm;

sepals (1.8–)2–3 mm, acute;

petals white, sometimes pink-tinged, oblanceolate to spatulate, 1.8–3 mm;

stamens 5, filaments 1.3–1.8 mm, anthers orangish to reddish brown, 0.4–0.6 mm;

carpels (1–)2–4, styles 1.5–2 mm.

dark brown, 2.5–3 mm.

yellowish green to light tan or gray-brown, 1.7–1.9 mm.