Flora of North America species comparison

spreading to ascending, branched.

erect to ascending, often dying to ground annually, rarely branched.

petiole 1–4 mm;

blade ovate to elliptic, 1–4 × 1–2(–3) cm, chartaceous, base usually obtuse, sometimes acute, margins crenate to serrate distally from middle, venation pinnate craspedodromous, secondary veins prominent, apex usually obtuse, sometimes acute, abaxial surface glabrous or puberulent, adaxial glabrous.

petiole 4–15 mm;

blade obovate to ovate, 2–8 × 1–3(–5) cm, membranous, base acute, margins usually coarsely serrate in distal 1/4–1/2 with secondary and tertiary teeth, teeth rounded or nearly entire with 1–2 teeth near apex, number of primary and secondary serrations 0–1 times number of secondary veins (excluding inter-secondary veins), venation pinnate cladodromous, secondary veins not prominent, apex acute to obtuse, surfaces glabrous.

mostly terminal, corymbiform or hemispheric panicles, 100–1000+-flowered, 2–4 × 2–4 cm height 0.8–1 times diam.;

branches glabrous or puberulent.

mostly terminal, corymbiform, 5–8 × 3–10 cm height 0.5–1 times diam.;

branches rarely in axils of leaves, glabrous or sparsely pubescent.

1–3(–5) mm, glabrous or puberulent.

0.5–4 mm, glabrous or sparsely pubescent.

2–4 mm diam.;

hypanthia hemispheric, 0.5–1.1 mm, abaxial surface glabrous or pubescent, adaxial pubescent;

sepals triangular, 0.8–1 mm;

petals light to dark pink, ovate to obovate, 1–2.5 mm, veins prominent;

staminodes 5–10, reduced, fused, appearing as scalloped ring;

stamens 35–40, 2 times petal length.

4–6 mm diam.;

hypanthia hemispheric, 0.5–1 mm, abaxial surface glabrous, adaxial glabrous or glabrate;

sepals triangular, 0.5–1.1 mm;

petals white, orbiculate, 1–2 mm;

staminodes 10–12;

stamens 18–24, 2 times petal length.

oblanceoloid, 2–3 mm, shiny, glabrous, adaxial suture sparsely ciliate.

oblanceoloid to ellipsoid, 2–2.5 mm, glabrous or sparsely pubescent.