Flora of North America species comparison

with terminal end buds, glabrous.

with terminal end buds, sparsely hairy.

persistent;

petiole 5–8 mm, glabrous, eglandular;

blade narrowly elliptic to elliptic or oblanceolate, 5–10 × 1.5–4 cm, base cuneate to obtuse, margins entire or spinose-serrate, sometimes undulate, teeth sharp, eglandular, apex usually acute to short-acuminate, sometimes obtuse-apiculate, apicula acute, surfaces glabrous, abaxial glandular, glands 2, proximal, flat, circular to oval.

deciduous;

petiole 10–20 mm, hairy, sometimes glandular distally, glands 1–2;

blade elliptic-ovate to obovate, 5–12 × 2.5–7 cm, base rounded, margins doubly serrate, teeth aristate, glandular, apex acuminate, abaxial surface hairy along midribs and veins, adaxial glabrous.

12–30-flowered, racemes;

central axes 13–30(–43) mm, leafless at bases.

2–6-flowered, corymbs;

central axes 4–8(–20) mm.

1–4 mm, glabrous.

15–25 mm (subtended by leafy bracts), hairy.

usually bisexual, proximal sometimes staminate, blooming before leaf emergence;

hypanthium cupulate, 2.5–3 mm, glabrous externally;

sepals spreading, semicircular, 0.5–1 mm, margins usually entire, sometimes glandular-toothed, surfaces glabrous;

petals white, suborbiculate to elliptic, 1–1.5 mm;

ovaries glabrous.

blooming before leaf emergence;

hypanthium tubular, 7–8 mm, hairy externally;

sepals spreading, ovate-lanceolate, 4–5 mm, margins glandular-toothed, abaxial surface hairy, adaxial sparsely hairy;

petals white or pink, broadly elliptic to obovate, 13–15 mm;

ovaries glabrous.

black, ovoid, 9–12 mm, glabrous;

mesocarps leathery;

stones ovoid, not flattened, usually splitting open.

black, subglobose, 7–12 mm, glabrous;

mesocarps fleshy;

stones ellipsoid, not flattened.

= 32.

= 16 (Japan).