Flora of North America species comparison

with terminal end buds, glabrous.

with terminal end buds, glabrous.

deciduous;

petiole 5–10(–15) mm, not winged, glabrous, sometimes glandular distally, glands 1–4, discoid;

blade oblong to lanceolate, folded along midribs, often falcate, (5–)7–15 × 2–4.5 cm, base cuneate to obtuse, margins crenulate-serrulate, teeth blunt, glandular, apex acuminate, surfaces glabrous.

persistent;

petiole 3–25 mm, glabrous, eglandular;

blade oblong-ovate to ovate-lanceolate or ovate to suborbiculate, 1.6–12 × 1.2–5(–7) cm, base usually broadly rounded to subcordate, sometimes obtuse, margins spinose-dentate to spinose-serrulate or entire, sometimes undulate, teeth sharp, callus-tipped, sometimes glandular at leaf base, apex acute to acuminate, surfaces glabrous, abaxial eglandular, if glands present, restricted to margins.

usually solitary flowers, sometimes 2-flowered fascicles.

15–40-flowered, racemes;

central axes 30–80 mm, leafless at bases.

0–3 mm, glabrous.

1–5 mm, glabrous.

blooming before leaf emergence;

hypanthium cupulate, 4–5 mm, glabrous externally;

sepals spreading, oblong-ovate, 3.5–5 mm, margins entire, ciliate, abaxial surface hairy (especially along margins), adaxial glabrous;

petals dark pink, obovate to suborbiculate, 10–17 mm;

ovaries hairy.

blooming before leaf emergence;

hypanthium cupulate, 2–3 mm, glabrous externally;

sepals erect to spreading, triangular, 0.7–1.2 mm, margins entire, surfaces usually glabrous, rarely with scattered hairs;

petals white to yellowish, elliptic, obovate, or suborbiculate, 1–3 mm;

ovaries glabrous.

yellow to orange tinged with red, globose, 40–80 mm, velutinous (glabrous in nectarines);

mesocarps fleshy;

stones ellipsoid, strongly flattened, deeply pitted, furrowed.

dark red to purple or blue-black, obovoid or ellipsoid to globose, 12–25 mm, glabrous;

mesocarps leathery;

stones subglobose to ellipsoid, ± flattened.

= 16.