Flora of North America species comparison

ascending to erect, 2–6 dm.

alternate, rarely opposite, pinnately compound, sometimes simple or palmately compound;

stipules present, rarely absent.

6–25(–30) cm; sheathing base minutely glandular abaxially;

petiole 0.5–8(–10) cm;

leaflets 12–30 per side, obovate to broadly cuneate, 5–12(–15) mm, incised 1/3–1/2 to base into 3–5 oblong to ovate teeth, sometimes entire, sparsely short-strigose to -villous, sometimes glabrate.

(5–)8–60-flowered, 2–12 cm diam.

5–30(–35) mm.

9–12 mm diam.;

epicalyx bractlets narrowly lanceolate to lanceolate, 1–2 mm;

hypanthium interior brick- to blood-red or golden, 0.5–1.5 × 3–5 mm;

sepals 3–4.5 mm, base brick- to blood-red adaxially, apex acute to acuminate;

petals brick- to blood-red, linear to oblanceolate or narrowly elliptic, 2–3.5 mm;

stamens 5, filaments 1.3–2 mm, anthers maroon, oblong, 0.6–0.9 mm;

carpels 1–5, styles 2–3 mm.

torus usually enlarged, sometimes small or absent;

carpels 1–260(–450), distinct, free, styles distinct, rarely connate (Roseae);

ovules 1(or 2), collateral (Rubeae) or superposed (Fallugia, Filipendula).

achenes or aggregated achenes sometimes with fleshy, urn-shaped hypanthium or enlarged torus, sometimes aggregated drupelets;

styles persistent or deciduous, not elongate (elongate but not plumose in Geum).

brown, 2–2.5 mm.

= 7(8).

= 28.