Prunus fasciculata |
Prunus nigra |
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desert almond, desert peach, wild almond |
black plum, Canada plum, Canadian plum, prunier noir |
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Habit | Shrubs, suckering, much branched, 10–20(–30) dm, thorny. | Shrubs or trees, sometimes suckering, 30–90 dm, moderately thorny. | ||||
Twigs | with axillary end buds, glabrous or canescent. |
with axillary end buds, usually glabrous, rarely hairy. |
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Leaves | deciduous; sessile; blade oblanceolate to linear, 0.5–2 × 0.1–0.2(–0.4) cm, base long-attenuate, margins nearly entire or obscurely and remotely serrulate in distal 1/3, teeth blunt to sharp, sometimes glandular, apex rounded to acute, surfaces puberulent or glabrous or low-papillate (var. punctata). |
deciduous; petiole 8–22 mm, glabrate with hairs adaxially, sometimes glandular distally, glands 1–3, discoid; blade broadly elliptic to obovate, (5–)7–11 × 3–6.5 cm, base obtuse to rounded or subcordate, margins doubly crenate-serrate, teeth blunt, glandular, apex abruptly acuminate, abaxial surface hairy along midribs and major veins, adaxial glabrous. |
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Inflorescences | solitary flowers or 2-flowered fascicles. |
2–4-flowered, umbellate fascicles. |
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Pedicels | 0–4 mm, glabrous. |
7–20 mm, usually glabrous, rarely hairy. |
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Flowers | unisexual, plants dioecious, blooming at leaf emergence; hypanthium campanulate, 1.5–3 mm, glabrous externally; sepals erect-spreading, triangular, 0.7–1 mm, margins entire, surfaces glabrous; petals white to yellowish, elliptic, obovate, or suborbiculate, 1.4–2.5(–4) mm; ovaries hairy. |
blooming before or at leaf emergence; hypanthium red-tinged, obconic, 3–4(–5) mm, usually glabrous, rarely hairy externally; sepals broadly spreading to reflexed, ovate, 2–4(–5) mm, margins glandular-toothed, abaxial surface usually glabrous, rarely sparsely hairy, adaxial glabrous or hairy; petals white, often fading to pink, suborbiculate to oblong-obovate, 8–13 mm; ovaries glabrous. |
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Drupes | gray to red-brown, ovoid, ± compressed, 7–15 mm, densely puberulent; hypanthium tardily deciduous; mesocarps leathery to dry; stones ovoid, ± flattened. |
red, orange, or yellowish, barely glaucous, globose to ellipsoid, 15–30 mm, glabrous; mesocarps fleshy; stones ovoid-ellipsoid, strongly flattened. |
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2n | = 16. |
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Prunus fasciculata |
Prunus nigra |
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Phenology | Flowering Apr–Jun; fruiting Aug–Sep. | |||||
Habitat | Borders of deciduous woods, bottomland forests, roadside thickets | |||||
Elevation | 10–800 m (0–2600 ft) | |||||
Distribution |
AZ; CA; NV; UT; nw Mexico
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CT; IA; IL; IN; MA; ME; MI; MN; ND; NH; NY; OH; VT; WI; MB; NB; NS; ON; QC
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
In the northeastern United States and adjacent Canada, Prunus nigra co-occurs with, and is sometimes confused with, P. americana, despite being distinct in both flower and leaf. The red-tinged hypanthia and sepals of P. nigra give the entire inflorescence a pinkish coloration even when the petals are pure white, and the sepals bear obvious glandular teeth along their margins; in P. americana the hypanthia and sepals are green and the sepals bear relatively few glandular teeth or are eglandular. The leaf marginal teeth of P. nigra are rounded and bear glands at their tips or have callus scars where the glands fell off; those of P. americana are acute and eglandular; some may have a callused tip. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 9, p. 370. | FNA vol. 9, p. 379. | ||||
Parent taxa | Rosaceae > subfam. Amygdaloideae > tribe Amygdaleae > Prunus | Rosaceae > subfam. Amygdaloideae > tribe Amygdaleae > Prunus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Emplectocladus fasciculatus | |||||
Name authority | (Torrey) A. Gray: Proc. Amer. Acad. Arts 10: 70. (1874) | Aiton: Hort. Kew. 2: 165. (1789) | ||||
Web links |