Plants leafy-stemmed. Stems 30–100 cm, hirsute, ?some hairs 2–2.5 mm?. Leaves: basal 15–32 cm, blade simple, lyrate-pinnate, or pinnate, major leaflets 1–7, alternating with 0–10 minor leaflets, terminal leaflet slightly to much larger than major laterals; cauline 3.5–18 cm, stipules ± free, 4–14 × 7–17 mm, blade pinnate, 3-foliolate, or simple and unlobed. Inflorescences 2–9-flowered. Pedicels densely puberulent, hirsute, eglandular. Flowers erect; epicalyx bractlets 1–2 mm; hypanthium green; sepals spreading but soon reflexed, 3–10 mm; petals spreading, white, oblong to elliptic, 2–5 mm, shorter than sepals, apex obtuse to rounded. Fruiting tori sessile, glabrous except for ring of bristles at base and tuft at apex. Fruiting styles geniculate-jointed, proximal segment persistent, 2.5–5 mm, apex hooked, glabrous, sometimes 1–2 eglandular bristles at base, distal segment deciduous, 1–2 mm, short hairs on basal 1/2. 2n = 42.
"Stem 4–10 dm, hirsutulous with mostly de flexed hairs; lower lvs long-petioled, pinnately compound, the segments pinnately lobed and incised; upper lvs 3-foliolate with cuneate-obovate segments, or merely 3-lobed; pedicels minutely puberulent and densely hirsute, the hairs commonly 1–1.5 mm long; sep triangular, 4–10 mm; pet white, 3–5 mm; head of achenes subglobose, 12–18 mm; receptacle glabrous or with a few short bristles; achenes 3–5 mm, excluding the style, glabrous or sparsely hirsute; 2n=42. In moist or wet soil; N.S. to s. Ont. and Mich., s. to N.J., w. Va., W.Va., Ky., and Mo. May, June."
|Rough avens, benoîte lacinicée|