Flora of North America species comparison

usually ± erect, sometimes nearly prostrate, 0.5–1.5(–2) dm.

ascending to erect, 0.3–1.2 dm.

very tightly cylindric (mousetail-like, with individual leaflets scarcely distinguishable), 2–5(–10) cm; sheathing base densely strigose abaxially;

petiole 0.2–0.8(–1) cm, hairs 0.5–1.5 mm;

leaflets 25–40 per side, 0.4–1 mm, densely sericeous, glands obscured, lobes 2–5, obovate or oval to orbiculate, apex not setose.

weakly planar to loosely ± cylindric, (0.5–)2–4(–6) cm; sheathing base glandular abaxially, otherwise glabrous;

petiole 0.5–2 cm, hairs 0.2–1 mm;

leaflets 5–6 per side, 2–6 mm, ± short-hirsute, glandular-puberulent, lobes 2–7, oblanceolate to spatulate or obovate, apex not setose.

(0–)1–2, paired if 2.

1–3, not paired.

10–30-flowered, 1–2(–3.5) cm diam.;

glomerules usually 1.

3–14-flowered, 1–2.5 cm diam.;

glomerules 1.

0.3–2(–3.5) mm.

1.5–6 mm.

5–6 mm diam.;

epicalyx bractlets oblong to obovate, 0.5–1 mm;

hypanthium shallowly cupulate, 0.5–1(–1.5) × 1.5–2.5 mm;

sepals (1–)1.5–2.5 mm, acute;

petals yellow, linear to oblanceolate or narrowly oblong, 1–2 mm;

stamens 5, filaments 0.3–0.6 mm, anthers yellow, 0.4–0.6 mm;

carpels 1–4, styles 0.7–1.2 mm.

8–10 mm diam.;

epicalyx bractlets linear to narrowly lanceolate or elliptic, 2.5–5 mm, longer than sepals;

hypanthium shallowly cupulate, 0.5–1 × 2–3 mm;

sepals 1.5–2.5 mm, ± acute;

petals pale yellow, linear to narrowly oblanceolate, 1.5–2.5 mm;

stamens 5, filaments 0.7–1.3 mm, anthers yellow, 0.5–0.8 mm;

carpels 6–11, styles 1–1.5 mm.

grayish brown, mottled with red, 1.6–2 mm.

cream to light tan, 1.2–1.5 mm.