Prunus armeniaca
Prunus domestica
albaricoque, apricot, damasco, Siberian apricot
common garden plum, cultivated plum, European plum, prunier damas
with axillary end buds, glabrous.
with axillary end buds, usually hairy, sometimes glabrous.
deciduous;
petiole (12–)20–45 mm, glabrous, glandular distally or on margins at bases of blades, glands 1–5;
blade broadly ovate to suborbiculate, (3–)5–9 × (2–)4–8 cm, base usually obtuse to rounded, sometimes truncate or subcordate, margins singly to doubly crenate-serrate, teeth blunt, glandular, apex abruptly short-acuminate, abaxial surface with tufts of hairs in vein axils, adaxial glabrous.
deciduous;
petiole 6–20 mm, glabrous or hairy on adaxial surface or both surfaces, eglandular or glandular distally or on margins at bases of blades, glands 1–3;
blade elliptic to obovate, (2.5–)4–7(–9) × 1.5–5 cm, base cuneate to obtuse, margins singly to doubly crenate-serrate, teeth blunt, glandular, apex usually acute to abruptly acuminate, sometimes obtuse, abaxial surface hairy (especially along veins), adaxial glabrous or midribs hairy.
solitary flowers.
solitary flowers or 2-flowered fascicles.
1–3 mm, hairy.
(2–)10–20 mm, glabrous or hairy.
blooming before leaf emergence;
hypanthium tubular-campanulate, 4–6 mm, glabrous or sparsely hairy externally;
sepals reflexed, oblong-ovate, 4–6 mm, margins remotely glandular-toothed, surfaces sparsely hairy;
petals white (pink in bud), broadly elliptic to suborbiculate, 8–12 mm;
ovaries hairy.
blooming before or at leaf emergence;
hypanthium cupulate, 3–5 mm, glabrous externally;
sepals spreading to reflexed, ovate-elliptic to lanceolate, 3.5–6 mm, margins glandular-toothed, ciliate, surfaces glabrous or hairy;
petals white, oblong to suborbiculate, 7–14 mm;
ovaries glabrous.
yellow to orange, often tinged with red, ellipsoid to globose, laterally compressed, 25–60 mm, velutinous;
mesocarps fleshy;
stones ellipsoid to subglobose, strongly flattened, not pitted.
blue-black (green, yellow, or red in cultivars), ellipsoid to globose, 15–35 mm, glabrous;
mesocarps fleshy;
stones ovoid to ellipsoid, strongly flattened.
= 16.
= 48.
Prunus armeniaca
Prunus domestica
Commercial production of apricots in North America is in the western United States, mostly in the San Joaquin Valley of California. There is little market for fresh apricots because of their extremely short shelf life; most fruits are preserved by drying.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
The distinctions given in the literature between Prunus domestica and P. insititia, and which cultivated varieties are derived from each of them, are contradictory and confusing. After examining plants from North America, it seems best to treat these Eurasian introductions as one variable species without designation of infraspecific taxa.
European plums are grown along the West Coast, primarily in California, for prunes and other processed food. They are also grown in the Great Lakes region of Ontario, Michigan, and New York for both prunes and the local fresh market. Most of the commercial fresh plum market is supplied by fruits of the Japanese plum, Prunus salicina, and its hybrid derivatives, which include genetic material from native American species, for example, P. americana, P. angustifolia, and P. hortulana.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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