Flora of North America species comparison

blades usually oblong-elliptic to lanceolate, sometimes ovate, 4–16(–25) × 1–6(–10) mm, base usually truncate or cordate, sometimes cuneate, margins strongly revolute to flat, coarsely dentate or serrate, sinuses 5–25(–30)% to midvein, apex acute to obtuse, surfaces smooth to slightly plicate, only midvein ± obscured adaxially within medial fold, abaxial tomentose to woolly (obscuring lateral veins), adaxial usually glabrous, sometimes sparsely hairy proximally on midvein, feathery hairs usually absent, rarely 1+ on midveins abaxially, midveins and petioles abaxially stipitate-glandular.

alternate, simple, sometimes pinnately compound or basal leaflets 1(or 2);

stipules deciduous or persistent, free or adnate to petiole;

venation pinnate.

10–30 mm.

erect at flowering;

sepals lanceolate to narrowly elliptic, 4–10 × 0.6–1.5 mm;

petals 8, spreading, usually white or cream, sometimes yellow, 9–14 × 5–11 mm;

filaments glabrous.

perianth and androecium perigynous;

epicalyx bractlets absent;

hypanthium saucer-shaped, obconic, funnelform-turbinate, or cylindric;

torus absent or hemispheric;

carpels 1(or 2) or 4–150, distinct, free, styles terminal, distinct;

ovule 1, basal (without obturator).

achenes or aggregated achenes;

styles persistent, elongate.

2.5–3 mm;

styles 11–25 mm.

= 18.