Flora of North America species comparison

number not recorded, prostrate or spreading to weakly erect, stolon nodes bearing single leaves or condensed shoots, consisting of paired (1–)3-lobed green bractlets and 1+ leaves, developing into new plantlets, adventitious roots, and peduncles.

often winter-persistent, basal or cauline, alternate, ternate;

stipules persistent, proximally adnate to base of petiole, sheathing, broadly lanceolate to narrowly ovate, margins entire;

petiole present;

blade ± cordate in outline, (1–)2–7 cm, foliaceous, leaflets 3, elliptic to obovate, margins flat, ± doubly serrate or crenate, venation pinnate, surfaces sparsely pilose or strigose (at least abaxially).

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

stipules present, rarely absent.

axillary at stolon nodes, flowers solitary;

bracts absent;

bracteoles absent.

present, straight.

[5–]15–20 mm diam.;

epicalyx bractlets 5;

hypanthium cupulate, 1–3 × 2.5–5 mm;

sepals 5, spreading to erect, broadly lanceolate to ovate;

petals 5, yellow, narrowly obcordate to obovate, ± equal to or shorter than sepals;

stamens 20, 25, or 30, shorter than petals, filaments filiform, glabrous, thecae paired on sides of narrow connective, dehiscing by broad lateral slits;

torus turbinate to hemispheric;

carpels 50–100, glabrous, styles subterminal, filiform;

ovule 1.

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).

accessory; aggregated achenes, 50–100 or less, borne on enlarged torus, superficial on flesh, obliquely ovoid, [8–]10–15(–20) mm, glabrous;

torus reddish, compressed ovoid, [0.8–]1–1.5 cm, fleshy (not pulpy), apex rounded, glabrous;

hypanthium persistent;

sepals persistent, spreading;

styles tardily deciduous, jointed.

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).

= 7.

= 7(8).