Crataegus leonensis

E. J. Palmer

J. Arnold Arbor. 13: 422, fig. 1. 1932.

Endemic
Treatment appears in FNA Volume 9. Treatment on page 615. Mentioned on page 613, 616.

Trees, 100–120 dm. Stems: trunk bark dark gray to nearly black, thick, ridged; branches broadly spreading, intricate; twigs ± flexuous, new growth olive green, glabrous, 1-year old very dark-brown, older gray; thorns on twigs few, straight, 1-year old very dark, older graying, fine, 3.5 cm. Leaves: petiole length 40–50% blade, pubescent in sulcus, densely sessile-glandular; blade narrowly ovate to rhombic-ovate or broadly ovate, sometimes oblong or ± obovate, 2.5–5 cm, ± thin, base cuneate, lobes 0, or 1 or 2 per side, obscure, sinuses shallow, lobe apex obtuse or acute, margins finely to obscurely crenate-serrate, teeth gland-tipped, veins 3 or 4 per side, apex acute, abaxial surface glabrous, adaxial glabrate, main veins sparsely pilose. Inflorescences 3–7-flowered; branches glabrate to moderately pilose; bracteoles caducous, narrowly oblong, margins glandular. Flowers 16–20 mm diam.; hypanthium glabrous; sepals narrowly triangular, margins glandular-serrate; stamens 20, anthers pink to pale-purple; styles 2–5. Pomes orange-red to russet, often green-mottled, suborbicular, 9–12 mm diam., glabrous; sepals prominent, ± elevated, spreading; pyrenes (2 or) 3 or 4 (or 5).


Phenology: Flowering Apr; fruiting Sep–Oct.
Habitat: Sandy upland woods
Elevation: 20–50 m

Discussion

Most specimens of Crataegus leonensis are from Leon County, Florida, but a few come from southern Georgia.

Crataegus leonensis is most similar to C. mira, of which it may prove to be an extreme form; it has smaller flowers and differently shaped, narrower leaves. An unnamed entity from northern Florida and southeastern Alabama to North Carolina, which could key to C. leonensis, is held to be closer to C. annosa. It differs from C. leonensis by larger leaves (3–5 cm) and fruit (12–15 mm), somewhat different leaf shape (broadly elliptic to rhombic, sharply lobed), always dense inflorescence indumentum, and cream anthers. Crataegus subflavida Murrill may be synonymous but has larger yellow pomes.

Selected References

None.

Lower Taxa

None.
... more about "Crataegus leonensis"
glabrous +, glabrescent +  and hairy +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
pink +  and pale-purple +
James B. Phipps +
E. J. Palmer +
thin-exfoliating +  and corrugated +
compound +  and simple +
opposite +  and alternate +
cuneate +
8 cm80 mm <br />0.08 m <br /> (12 cm120 mm <br />0.12 m <br />) +
obovate +, oblong +, narrowly ovate +  and rhombic-ovate or broadly ovate +
2.5 cm25 mm <br />0.025 m <br /> (5 cm50 mm <br />0.05 m <br />) +
glabrate +  and moderately pilose +
adnate +  and distinct +
crowded +, scattered +  and alternate +
Fla. +  and Ga. +
not +  and aggregated +
20–50 m +
1.6 cm16 mm <br />0.016 m <br /> (2 cm20 mm <br />0.02 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
not +  and aggregated +
yellow +  and red or purplish +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
gray +, dark-brown +  and olive green +
older +, old +  and new +
Sandy upland woods +
constricted +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
crassinucellate +
deciduous +
craspedodromous +
glandular-serrate +  and crenate-serrate +
stipitate-glandular +
glandular-crenate to glandular-serrate +  and glandular-crenate +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and basal +
larger +  and reduced +
0.8 cm8 mm <br />0.008 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
elliptic +  and circular +
0 (?) +  and 4 (?) +
free +  and distinct +
post-mature +
pubescent +
Flowering Apr +  and fruiting Sep–Oct. +
adnate +, free +, connate +  and distinct +
dark gray-brown +  and russet +
exfoliating +  and corrugated +
pruinose +
green-mottled +, orange-red +  and russet +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
suborbicular +
J. Arnold Arbor. +
not arillate +
persistent +
free +  and distinct +
elevated +  and prominent +
triangular +
nonaccrescent +
1-50-flowered +  and few-leaved +
free +  and distinct +
branched +  and simple +
persistent +
distinct +
exsert +  and lateral +
elongate +
glabrous +  and tomentose +
Crataegus leonensis +
Crataegus (sect. Coccineae) ser. Apricae +
species +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
graying +  and dark +
straight +
older +  and old +
slender +
3.5 cm35 mm <br />0.035 m <br /> (?) +
gland-tipped +
inconspicuous +
less erect +  and oblique +
1 +  and several +
flexuous +
determinate +
4 +  and 3 +