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desert almond, desert peach, wild almond

Oklahoma plum, Oklahoma plume

Habit Shrubs, suckering, much branched, 10–20(–30) dm, thorny. Shrubs, suckering, 3–15 dm, not thorny.
Twigs

with axillary end buds, glabrous or canescent.

with axillary end buds, densely hairy.

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 3–8 mm, densely hairy, usually eglandular, sometimes glandular distally, glands 1–3, discoid;

blade usually ovate or elliptic, rarely obovate, 2–5(–7) × 1–2.5(–3.6) cm, base obtuse to cuneate, margins finely, singly or doubly serrulate, teeth sharp, usually eglandular, sometimes glandular, glands blackish, spheric, apex acute to obtuse, abaxial surface densely hairy, adaxial sparsely hairy.

Inflorescences

solitary flowers or 2-flowered fascicles.

2–4(–6)-flowered, umbellate fascicles.

Pedicels

0–4 mm, glabrous.

4–15 mm, hairy.

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 campanulate, 2–3 mm, hairy externally;

sepals erect to spreading, ovate-oblong, 1.5–2.5 mm, margins usually entire, sometimes glandular-toothed or eglandular, sometimes ciliate, surfaces hairy;

petals white, oblong to obovate, 4–7 mm;

ovaries glabrous.

Drupes

gray to red-brown, ovoid, ± compressed, 7–15 mm, densely puberulent;

hypanthium tardily deciduous;

mesocarps leathery to dry;

stones ovoid, ± flattened.

yellow, orange, or red, slightly glaucous, globose to ellipsoid, 9–18 mm, glabrous;

mesocarps fleshy;

stones subglobose to ellipsoid, ± flattened.

Prunus fasciculata

Prunus gracilis

Phenology Flowering Mar–Apr; fruiting Jun–Aug.
Habitat Sandy roadsides, upland thickets, open woods, waste places
Elevation 100–1300 m (300–4300 ft)
Distribution
from FNA
AZ; CA; NV; UT; nw Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
AR; CO; KS; LA; NM; OK; TX
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Typically, sepals of Prunus gracilis are eglandular; in some specimens, glands occur along the margins. Similar glands are sometimes found on the tips of teeth along the leaf margins. The teeth are always sharp-pointed rather than blunt or rounded as they are in those plums whose leaves consistently have glandular teeth. Presence of glands on the sepals is not correlated with glands on leaf marginal teeth. Prunus gracilis, native to the southern Great Plains, is very similar to P. maritima, a plum of the eastern seaboard over 1600 km away.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Leaf blades sparsely to densely puberulent, not papillate.
var. fasciculata
1. Leaf blades glabrous, sometimes papillate.
var. punctata
Source FNA vol. 9, p. 370. FNA vol. 9, p. 380.
Parent taxa Rosaceae > subfam. Amygdaloideae > tribe Amygdaleae > Prunus Rosaceae > subfam. Amygdaloideae > tribe Amygdaleae > Prunus
Sibling taxa
P. americana, P. andersonii, P. angustifolia, P. armeniaca, P. avium, P. caroliniana, P. cerasifera, P. cerasus, P. domestica, P. dulcis, P. emarginata, P. eremophila, P. fremontii, P. geniculata, P. glandulosa, P. gracilis, P. havardii, P. hortulana, P. ilicifolia, P. laurocerasus, P. lusitanica, P. mahaleb, P. maritima, P. mexicana, P. minutiflora, P. murrayana, P. myrtifolia, P. nigra, P. padus, P. pensylvanica, P. persica, P. pumila, P. rivularis, P. serotina, P. speciosa, P. spinosa, P. subcordata, P. subhirtella, P. texana, P. tomentosa, P. umbellata, P. virginiana, P. yedoensis
P. americana, P. andersonii, P. angustifolia, P. armeniaca, P. avium, P. caroliniana, P. cerasifera, P. cerasus, P. domestica, P. dulcis, P. emarginata, P. eremophila, P. fasciculata, P. fremontii, P. geniculata, P. glandulosa, P. havardii, P. hortulana, P. ilicifolia, P. laurocerasus, P. lusitanica, P. mahaleb, P. maritima, P. mexicana, P. minutiflora, P. murrayana, P. myrtifolia, P. nigra, P. padus, P. pensylvanica, P. persica, P. pumila, P. rivularis, P. serotina, P. speciosa, P. spinosa, P. subcordata, P. subhirtella, P. texana, P. tomentosa, P. umbellata, P. virginiana, P. yedoensis
Subordinate taxa
P. fasciculata var. fasciculata, P. fasciculata var. punctata
Synonyms Emplectocladus fasciculatus
Name authority (Torrey) A. Gray: Proc. Amer. Acad. Arts 10: 70. (1874) Engelmann & A. Gray: Boston J. Nat. Hist. 5: 243. (1845)
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