Flora of North America species comparison

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

stipules present, rarely absent.

sheathing base sparsely glandular abaxially, otherwise glabrous.

5–6+ mm at flowering, to 15(–30) mm in fruit.

5–40, 7–10 mm diam.;

epicalyx bractlets narrowly lanceolate, 0.8–1 mm, usually less than 1/2 as long as sepals;

hypanthium interior pale green or cream to maroon;

sepals (1.2–)1.5–2.5 mm;

petals white;

filaments white, anther margins reddish.

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).

± 2 mm, rugose.

= 7(8).

= 28.