Flora of North America species comparison

erect to ascending, green, older stems brown, branched, glabrous or sparsely strigose (especially at nodes);

bark deciduous, exfoliating or flaking, reddish;

branches erect to arching;

axillary buds hidden in pouches, sometimes apex exposed, especially on vigorous sprout-shoots.

petiole 1–6 mm;

blade usually broadly lanceolate to broadly ovate, or narrowly to broadly elliptic, rarely narrowly lanceolate in horticultural forms, 3–10 × 2–6 cm, larger blades usually greater than 6 × 2.5 cm, base narrowly cuneate to rounded, margins entire to irregularly or regularly serrate, crenate, or dentate, plane, abaxial surface glabrous or sparsely strigose, hairs usually appressed-ascending, not twisted, main vein axils often moderately to densely strigose-tomentose, main veins sometimes sparsely strigose, secondary and tertiary veins rarely sparsely strigose, adaxial surface glabrous or sparsely strigose, especially near base and margins.

cymose racemes, 5–7(–9)-flowered, proximal 2 flowers often in axils of nearly normal to much reduced (bracteal) leaves.

3–20 mm, glabrous or sparsely strigose.

hypanthium glabrous or sparsely strigose to villous;

sepals ovate, ovate-lanceolate, or triangular, 4–8 × 2.5–5 mm, apex acute to acuminate, abaxial surface glabrous or sparsely strigose, adaxial surface glabrous except densely villosulous distally;

petals white to cream, oblong, obovate, or orbiculate, 5–25 × 5–22 mm;

stamens 20–50;

filaments distinct, 4–9 mm;

anthers 1–1.5 × 0.7–1 mm;

styles 4, connate proximally, cylindric, 7–10 mm, lobes 3–8 × 0.3–0.9 mm;

stigmatic surfaces 1–4 mm.

obconic to obovoid, 7–11 × 4–7 mm.

caudate, 3 mm.

= 26.