Prunus caroliniana
Prunus rivularis
Carolina cherry laurel or laurel cherry, Carolina laurelcherry, laurier amande
creek plum, creek plume, hog plume
with terminal end buds, glabrous.
with axillary end buds, glabrous.
persistent;
petiole 5–8 mm, glabrous, eglandular;
blade narrowly elliptic to elliptic or oblanceolate, 5–10 × 1.5–4 cm, base cuneate to obtuse, margins entire or spinose-serrate, sometimes undulate, teeth sharp, eglandular, apex usually acute to short-acuminate, sometimes obtuse-apiculate, apicula acute, surfaces glabrous, abaxial glandular, glands 2, proximal, flat, circular to oval.
deciduous;
petiole 7–21 mm, glabrous or sparsely hairy on adaxial surface, glandular distally, glands 1–4;
blade lanceolate, oblong-lanceolate, or elliptic to narrowly elliptic, usually folded along midribs, 4–11 × 1.5–5 cm, base obtuse to rounded, margins singly to doubly crenate-serrulate, teeth blunt, glandular, glands inconspicuous, blackish, apex usually acuminate, sometimes acute, abaxial surface glabrous or ± hairy along midribs and veins, adaxial usually glabrous, rarely midribs hairy.
12–30-flowered, racemes;
central axes 13–30(–43) mm, leafless at bases.
2–4-flowered, umbellate fascicles.
1–4 mm, glabrous.
3–15 mm, glabrous.
usually bisexual, proximal sometimes staminate, blooming before leaf emergence;
hypanthium cupulate, 2.5–3 mm, glabrous externally;
sepals spreading, semicircular, 0.5–1 mm, margins usually entire, sometimes glandular-toothed, surfaces glabrous;
petals white, suborbiculate to elliptic, 1–1.5 mm;
ovaries glabrous.
blooming before or at leaf emergence;
hypanthium campanulate, 2–3 mm, usually glabrous, rarely glabrate, externally;
sepals broadly spreading to reflexed, oblong-ovate, 1.5–2.5 mm, margins glandular-toothed, abaxial surface glabrous or sparsely hairy, adaxial densely hairy at bases;
petals white, obovate, 4–7 mm;
ovaries glabrous.
black, ovoid, 9–12 mm, glabrous;
mesocarps leathery;
stones ovoid, not flattened, usually splitting open.
usually red, sometimes yellowish orange, with white dots, not or only slightly glaucous, globose, 12–25 mm, glabrous;
mesocarps fleshy;
stones ovoid to subglobose, ± flattened.
= 32.
Prunus caroliniana
Prunus rivularis
Prunus caroliniana is a popular ornamental for screens and trimmed hedges and is widely planted in the southeastern United States because of its lustrous, dark green foliage persistent through the seasons. The species was probably common as a native plant on the southeastern barrier islands; most inland occurrences represent escapes from cultivation. It rarely escapes from cultivation in California.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Prunus munsoniana is here placed in synonymy with P. rivularis, greatly expanding the range of the latter compared to its traditional treatment. Descriptions of P. munsoniana and P. rivularis differ mostly in size of the plants, leaves, and floral structures. As suggested by G. M. Diggs et al. (1999), P. munsoniana is simply a larger version of P. rivularis.
Evidence from analysis of DNA sequences of two nuclear genes in native plums (J. R. Rohrer et al. 2008) indicates that Prunus rivularis may be an allopolyploid. Three plants sequenced from Texas contained alleles seemingly derived from P. angustifolia on the one hand and P. hortulana (or P. murrayana) on the other. Further, two individuals determined as P. munsoniana, one each from Pennsylvania and Texas, had sequences very similar to those of P. rivularis.
Other specimens in herbaria labeled as Prunus munsoniana include hybrids between P. americana and P. angustifolia, as well as individuals of P. hortulana that bloom before the leaves emerge or that sucker freely.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
LA Plants
WildflowerSearch
iNaturalist
USDA Plants Database
CalFlora
IL Wildflowers
KS Wildflowers
MD Biodiversity
MO Plants
