Prunus dulcis |
Prunus havardii |
|
---|---|---|
almond, almond tree, amandier, sweet almond |
Havard's almond, Havard's plum |
|
Habit | Trees, not suckering, 50–80 dm, not thorny. | Shrubs, suckering unknown, much branched, 10–20 dm, thorny. |
Twigs | with terminal end buds, glabrous. |
with axillary end buds, puberulent. |
Leaves | deciduous; petiole (8–)10–25 mm, usually winged distally, glabrous, usually glandular distally or on margins at bases of blades; blade oblong to lanceolate, 2.5–10 × 1–3 cm, base obtuse, margins crenulate-serrulate to crenate-serrate, teeth blunt, glandular, apex acuminate, surfaces glabrous. |
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. |
Inflorescences | solitary flowers or 2-flowered fascicles. |
solitary flowers. |
Pedicels | 1–5 mm, glabrous. |
0 mm. |
Flowers | blooming before leaf emergence; hypanthium cupulate, 4–7 mm, glabrous externally; sepals erect-spreading to spreading, oblong-ovate, 4–8 mm, margins entire, tomentose, surfaces glabrous; petals pink to nearly white, obovate, elliptic, or suborbiculate, 12–25 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. |
Drupes | gray-green, ovoid-oblong, compressed, 25–40 mm, velutinous; mesocarps leathery (splitting); stones ellipsoid, strongly flattened, pitted. |
reddish brown, ovoid, 8–11 mm, puberulent; hypanthium tardily deciduous; mesocarps leathery to dry (splitting); stones ovoid, slightly flattened. |
2n | = 16. |
|
Prunus dulcis |
Prunus havardii |
|
Phenology | Flowering Feb–Mar; fruiting Jul–Sep. | Flowering Apr–Jun; fruiting Jun–Aug. |
Habitat | Roadsides, canyons, grasslands | Draws, dry rocky slopes of canyons, limestone soil, igneous rock |
Elevation | 20–500 m (100–1600 ft) | 700–1700 m (2300–5600 ft) |
Distribution |
CA; ID; WA; w Asia; n Africa [Introduced in North America]
|
TX; Mexico (Chihuahua) |
Discussion | The United States now dominates world almond production with over 40% of the annual crop, all of it grown in or near the Central Valley of California. The in-shell “nuts” sold in stores are the pits of drupes with the leathery mesocarp removed. Almond is among the earliest blossoming trees and one of the first signs of spring in areas where it is grown. (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.) |
Source | FNA vol. 9, p. 372. | FNA vol. 9, p. 371. |
Parent taxa | Rosaceae > subfam. Amygdaloideae > tribe Amygdaleae > Prunus | Rosaceae > subfam. Amygdaloideae > tribe Amygdaleae > Prunus |
Sibling taxa | ||
Synonyms | Amygdalus dulcis, A. communis, P. amygdalus | Amygdalus havardii |
Name authority | (Miller) D. A. Webb: Feddes Repert. 74: 24. (1967) | (W. Wight) S. C. Mason: J. Agric. Res. 1: 153, 176. (1913) |
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