Prunus serotina var. serotina

Synonyms: Prunus serotina subsp. eximia (Small) McVaugh P. serotina var. eximia
Treatment appears in FNA Volume 9. Treatment on page 364. Mentioned on page 363.

Twigs usually glabrous, sometimes hairy, hairs rusty brown. Leaves: petiole (7–) 10–23 (–30) mm, glabrous, glandular distally, glands 1–6; blade usually narrowly elliptic to elliptic or lanceolate, rarely obovate, 4–13.5 × 1.7–5.8 cm, membranous or slightly leathery, apex acute to acuminate, sometimes abruptly so, abaxial surface glabrous or midribs sparsely to densely hairy proximally. Inflorescences: rachises 35–140 mm. 2n = 32.


Phenology: Flowering Mar–Jun; fruiting Jun–Sep.
Habitat: Roadsides, edges of fields, secondary forests, open woodlands, ravines, along streams
Elevation: 0–1800 m

Distribution

V9 590-distribution-map.jpg

B.C., N.B., N.S., Ont., Que., Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., Wash., W.Va., Wis., Mexico (Chiapas), Mexico (Chihuahua), Mexico (Coahuila), Mexico (Colima [Socorro Island]), Mexico (Durango), Mexico (Hidalgo), Mexico (Jalisco), Mexico (Michoacán), Mexico (Nayarit), Mexico (Nuevo León), Mexico (Oaxaca), Mexico (Puebla), Mexico (San Luis Potosí), Mexico (Tamaulipas), Mexico (Veracruz), Central America (Guatemala)

Discussion

Plants of Prunus serotina from the Edwards Plateau in central Texas have often been recognized as subsp. or var. eximia. If it were not for their geographic isolation from the rest of var. serotina by 200 km, it is doubtful that taxonomists would even think about segregating these outliers from the plants of eastern North America. All of the suggested distinctive characteristics of var. eximia (glabrous leaves, branchlets, and inflorescences; coarsely toothed leaf margins; long petioles) can be found both separately and combined in specimens from other areas within the main range of var. serotina. The trees of the Edwards Plateau seem to be merely a homogeneous subset of the wide-ranging, heterogeneous var. serotina.

Selected References

None.

Lower Taxa

None.
hairy +  and glabrous +
4cm;13.5cm +
acute;acuminate +
leathery +  and membranous +
1.7cm +  and 5.8cm +
Joseph R. Rohrer +
Ehrhart +
dark gray +, gray-brown +, reddish-brown +  and reddish +
compound +  and simple +
opposite +  and alternate +
cuneate +  and rounded +
2 cm20 mm <br />0.02 m <br /> (13.5 cm135 mm <br />0.135 m <br />) +
ovate +, lanceolate +, obovate +, oblongelliptic +  and elliptic +
0.5 cm5 mm <br />0.005 m <br /> (18 cm180 mm <br />0.18 m <br />) +
membranous +  and leathery +
1.1 cm11 mm <br />0.011 m <br /> (?) +  and 6.5 cm65 mm <br />0.065 m <br /> (?) +
free +  and distinct +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
3.5 cm35 mm <br />0.035 m <br /> (16 cm160 mm <br />0.16 m <br />) +
solitary +, fascicles +, 2-flowered +  and umbellate +
B.C. +, N.B. +, N.S. +, Ont. +, Que. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, S.C. +, Tenn. +, Tex. +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Mexico (Chiapas) +, Mexico (Chihuahua) +, Mexico (Coahuila) +, Mexico (Colima [Socorro Island]) +, Mexico (Durango) +, Mexico (Hidalgo) +, Mexico (Jalisco) +, Mexico (Michoacán) +, Mexico (Nayarit) +, Mexico (Nuevo León) +, Mexico (Oaxaca) +, Mexico (Puebla) +, Mexico (San Luis Potosí) +, Mexico (Tamaulipas) +, Mexico (Veracruz) +  and Central America (Guatemala) +
not +  and aggregated +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
dark purple +  and nearly black +
globose +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0–1800 m +
flattened +
hairy +  and glabrous +
0.4 cm4 mm <br />0.004 m <br /> (4 cm40 mm <br />0.04 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
not +  and aggregated +
not +  and aggregated +
Roadsides, edges of fields, secondary forests, open woodlands, ravines, along streams +
rusty brown +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
18-55(-90)-flowered +
crassinucellate +
deciduous +
entire +, crenulate-serrulate +  and serrate +
glandular-toothed +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and apical +
hairy +  and glabrous +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0 (?) +  and 4 (?) +
free +  and distinct +
obovate;suborbiculate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
2.3 cm23 mm <br />0.023 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
Flowering Mar–Jun +  and fruiting Jun–Sep. +
adnate +, free +, connate +  and distinct +
Gartenkalender +
35mm +  and 140mm +
not arillate +
free +  and distinct +
erect-spreading +  and reflexed +
obovate +, lanceolate +, ovate-elliptic +, oblong +, ovate +, semicircular +  and triangular +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
free +  and distinct +
branched +  and simple +
1 +  and 20 +
linear;lanceolate +
not flattened +  and subglobose +
deciduous +
distinct +
basal +, lateral +, subterminal +  and terminal +
not elongate +
4 cm40 mm <br />0.04 m <br /> (13.5 cm135 mm <br />0.135 m <br />) +
acute +  and acuminate +
leathery +  and membranous +
1.7 cm17 mm <br />0.017 m <br /> (5.8 cm58 mm <br />0.058 m <br />) +
Prunus serotina subsp. eximia +  and P. serotina var. eximia +
Prunus serotina var. serotina +
Prunus serotina +
variety +
callus-tipped +  and glandular +
appressed +  and incurved +
blunt +  and sharp +
inconspicuous +
hairy +  and glabrous +
tree +, not suckering +  and shrub +
hairy +  and glabrous +