Quercus chapmanii |
Quercus gravesii |
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Chapman oak, Chapman's oak |
Chisos red oak, Graves oak |
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Habit | Shrubs, deciduous or subevergreen, 0.5-3(-6) m, often rhizomatous. | Trees, deciduous, to 13 m. Bark black, roughly furrowed. |
Bark | brown, scaly. |
|
Twigs | yellowish, 1-2 mm diam., densely fine-tomentulose. |
light brown to dark reddish brown, (1-)1.5-2.5 mm diam., glabrous or glabrate. |
Buds | reddish brown, globose, 1-2(-3) mm, proximal scales densely tomentulose, distal scales glabrous. |
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Leaves | blade obovate or oblanceolate, 30-70(-85) × 14-30(-45) mm, base cuneate or attenuate, margins minutely revolute, entire or sinuately lobed, sometimes obscurely 3-lobed distally or with 3-5 rounded, irregular lobes in distal 1/2, secondary veins curved, 8-9 on each side, apex ovate or triangular-lobed, often retuse; surfaces abaxially grayish or yellowish, with yellowish, erect branched hairs, these soon shed, leaving matted glandular and waxy hairs except on ± glabrate yellowish veins, adaxially bright glossy, very reflective, glabrous or with minute, scattered, stellate hairs. |
blade ovate to elliptic, 45-140 × 20-120 mm, base rounded (rarely subcordate) to obtuse or cuneate, margins with 3-5 acute lobes, 9-20 awns, apex broadly obtuse or acute to attenuate, occasionally falcate; surfaces abaxially light green or coppery green, glabrous with small axillary tufts of tomentum or pubescent along midrib and veins, adaxially shiny or glossy, glabrous except for scattered pubescence near base and along midrib. |
Acorns | 1-2, on peduncle 1-6(-35) mm; cup hemispheric, 5-11 m deep × 10-15 mm wide, including 1/3-1/2 nut, scales closely appressed, gray, tomentulose; nut light brown, ovoid to barrel-shaped, 15-20 × 9-13 mm, apex rounded, glabrous or puberulent. |
biennial; cup turbinate or deeply cup-shaped, 4.5-8.5 mm high × 7.5-12 mm wide, covering 1/3-1/2 nut, outer surface glabrate, inner surface glabrous to pubescent on inner 2/3, scale tips appressed, less than 4 mm, acute; nut ovoid to ellipsoid, rarely subglobose or oblong, 9-16 × 5.5-11 mm, occasionally striate, glabrous to puberulent, especially at apex, scar diam. 3-6 mm. |
Cotyledons | distinct. |
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Terminal | buds brown or reddish brown, ovoid or ellipsoid to subconic, 2-5 mm, glabrous or with tuft of hairs at apex. |
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Quercus chapmanii |
Quercus gravesii |
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Phenology | Flowering late winter–early spring. | Flowering spring. |
Habitat | Open pine forests, scrublands, xerophytic scrub oak, on sand near coast | Davis, Glass, and Chisos mountains |
Elevation | 0-100 m (0-300 ft) | above 1200 m (above 3900 ft) |
Distribution |
FL; GA; SC
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TX; n Mexico |
Discussion | Quercus gravesii reportedly hybridizes with Q. hypoleucoides. As noted above, forms of Q. gravesii and Q. robusta are easily confused and give the impression of belonging to a single morphologic continuum. Some authors have also used the name Quercus texana for Q. gravesii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Fagaceae > Quercus > sect. Quercus | Fagaceae > Quercus > sect. Lobatae |
Sibling taxa | ||
Synonyms | Q. chisosensis, Q. shumardii var. microcarpa, Q. stellipila, Q. texana var. chisosensis, Q. texana var. stellapila | |
Name authority | Sargent: Gard. & Forest 8: 93. (1895) | Sudworth: Check List For. Trees U.S., 86. (1927) |
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