Prunus fasciculata |
Prunus havardii |
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desert almond, desert peach, wild almond |
Havard's almond, Havard's plum |
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Habit | Shrubs, suckering, much branched, 10–20(–30) dm, thorny. | Shrubs, suckering unknown, much branched, 10–20 dm, thorny. | ||||
Twigs | with axillary end buds, glabrous or canescent. |
with axillary end buds, puberulent. |
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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 1–3 mm, glabrous or puberulent, eglandular; blade rhombic, obovate, or fan-shaped, 0.5–1.6(–2) × 0.2–0.8(–1.4) cm, base broadly obtuse or rounded to nearly truncate, margins serrate or dentate in distal 1/2, teeth blunt to sharp, some callus-tipped, rarely glandular, apex rounded to obtuse, surfaces puberulent. |
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Inflorescences | solitary flowers or 2-flowered fascicles. |
solitary flowers. |
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Pedicels | 0–4 mm, glabrous. |
0 mm. |
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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. |
unisexual, plants dioecious, blooming at leaf emergence; hypanthium campanulate, 2.5–3 mm, glabrous externally; sepals spreading to reflexed, triangular, 0.7–1 mm, margins entire, sparsely ciliate, surfaces glabrate; petals white, obovate, 2 mm; ovaries hairy. |
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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. |
reddish brown, ovoid, 8–11 mm, puberulent; hypanthium tardily deciduous; mesocarps leathery to dry (splitting); stones ovoid, slightly flattened. |
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Prunus fasciculata |
Prunus havardii |
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Phenology | Flowering Apr–Jun; fruiting Jun–Aug. | |||||
Habitat | Draws, dry rocky slopes of canyons, limestone soil, igneous rock | |||||
Elevation | 700–1700 m (2300–5600 ft) | |||||
Distribution |
AZ; CA; NV; UT; nw Mexico
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TX; Mexico (Chihuahua) |
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Prunus havardii is endemic to the Chihuahuan Desert of trans-Pecos Texas and across the Rio Grande in Mexico, with most collections from the Big Bend area. (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. 371. | ||||
Parent taxa | Rosaceae > subfam. Amygdaloideae > tribe Amygdaleae > Prunus | Rosaceae > subfam. Amygdaloideae > tribe Amygdaleae > Prunus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Emplectocladus fasciculatus | Amygdalus havardii | ||||
Name authority | (Torrey) A. Gray: Proc. Amer. Acad. Arts 10: 70. (1874) | (W. Wight) S. C. Mason: J. Agric. Res. 1: 153, 176. (1913) | ||||
Web links |