Quercus oglethorpensis

Duncan

Amer. Midl. Naturalist 24: 755. 1940.

Common names: Oglethorpe oak
Conservation concernEndemicIllustrated
Treatment appears in FNA Volume 3.

Trees, deciduous, to 18 (-25) m. Bark light gray or whitish, scaly. Twigs brownish red, ca. 1 mm diam., sparsely pubescent, glabrate with age. Buds reddish-brown, globose, to 2-2.5 mm, sparsely pubescent or glabrous. Leaves: petiole 2-7 mm. Leaf-blade narrowly elliptic or oblanceolate, ± planar, not strongly convexly cupped, 50-150 × 20-45 mm, base cuneate to cordate, margins entire or on vigorous shoots sometimes sinuate near apex, secondary-veins 3-5 on each side, apex rounded, obtuse or broadly acute; surfaces abaxially yellowish green, covered with persistent velvety branched hairs, adaxially dark green, dull or glossy, sparsely stellate, often somewhat sandpapery with harsh hairs. Acorns 1-2, subsessile or on peduncle to 7 mm; cup turbinate, somewhat constricted proximally, 8 mm deep × 10 mm wide, enclosing 1/3 nut or more, scales closely appressed, finely tan-pubescent; nut gray brown, ovoid, 9-11 × (5-) 7-9 mm, finely puberulent. Cotyledons distinct.


Phenology: Flowering spring.
Habitat: Alluvial flatwoods and streamsides in rich woods, low pastures, and edge of bottomland forests
Elevation: 0-200 m

Discussion

Of conservation concern.

Since its original discovery in 1940 in Oglethorpe County, Georgia, Quercus oglethorpensis has been found to be more common locally near the type site in Georgia and South Carolina than originally thought. It remains one of the least-known oak species of the southeastern United States. Quercus oglethorpensis is one of our most distinctive eastern oaks, easily recognized by its narrow, entire, abaxially felty leaves.

Selected References

None.

Lower Taxa

None.
... more about "Quercus oglethorpensis"
on peduncle +  and subsessile +
Acute (?) +, Obtuse (?) +  and Rounded (?) +
Kevin C. Nixon +
Duncan +
whitish;light gray +
cuneate;cordate +
reddish-brown +
glabrous +  and pubescent +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
2-6-lobed +
pistillate +, capitate +  and spicate +
Oglethorpe oak +
starchy +  and fleshy +
turbinate +
constricted +
8 cm80 mm <br />0.08 m <br /> (?) +
multibracteate +, spiny +  and scaly +
Ga. +, La. +, Miss. +  and S.C. +
0-200 m +
pistillate +  and staminate +
biennial +, annual +  and maturation +
1-seeded +  and winged +
in groups +  and enclosed +
Alluvial flatwoods and streamsides in rich woods, low pastures, and edge of bottomland forests +
persistent +
pistillate +, spicate +  and staminate +
tomentulose +  and glabrate +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
arranged +  and alternate +
on vigorous shoots +  and entire +
toothed +  and entire +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
gray brown +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
puberulent +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
0 cm0 mm <br />0 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
Flowering spring. +
Amer. Midl. Naturalist +
connate +  and distinct +
tan-pubescent +
few-to-many +
reduced +
anastomosing +, branching +  and unbranched +
sinuate +
Conservation concern +, Endemic +  and Illustrated +
inconspicuous +
distinct +
subulate +  and dilated +
enlarged +
dark green +  and yellowish green +
glossy +  and dull +
Quercus oglethorpensis +
Quercus sect. Quercus +
species +
spheric +  and ovoid terete or angled +
bristle-tipped +
brownish red +
1 cm10 mm <br />0.01 m <br /> (?) +
glabrate +  and pubescent +