Quercus chapmanii |
Quercus carmenensis |
|
---|---|---|
Chapman oak, Chapman's oak |
Mexican oak |
|
Habit | Shrubs, deciduous or subevergreen, 0.5-3(-6) m, often rhizomatous. | Shrubs or trees, deciduous, shrubs 0.5-2 m, rhizomatous, trees (on better sites) to 12 m, trunk 0.75 m diam. |
Bark | brown, scaly. |
light gray, checkered or furrowed. |
Twigs | yellowish, 1-2 mm diam., densely fine-tomentulose. |
often strikingly red, 1-1.5 mm diam., sparingly (rarely densely) stellate-pubescent, somewhat glabrescent and gray 2d year. |
Buds | reddish brown, globose, 1-2(-3) mm, proximal scales densely tomentulose, distal scales glabrous. |
light brown, nearly round, 1-1.5 mm, indumentum similar to twigs. |
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 obovate or narrowly obovate, (20-)30-50 × 10-30 mm, thin to moderately leathery, base cuneate to rounded, margins shallowly and irregularly lobed or coarsely toothed in distal 1/2, rarely subentire, teeth mucronate, secondary veins 9-12 on each side, branching or passing directly to teeth, apex acute, sometimes broadly rounded; surfaces abaxially light green or yellow-green, prominently pubescent with minute, erect velvety hairs, adaxially surfaces dark green, sparsely and minutely stellate-pubescent. |
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. |
solitary or paired, subsessile or short-pedunculate (immature); cup (mature) unknown; scales (immature) light brown, tip acute, canescent. |
Cotyledons | distinct. |
unknown. |
Nut | unknown. |
|
Quercus chapmanii |
Quercus carmenensis |
|
Phenology | Flowering late winter–early spring. | |
Habitat | Open pine forests, scrublands, xerophytic scrub oak, on sand near coast | Shrublands and woodlands on limestone |
Elevation | 0-100 m (0-300 ft) | 2200-2500 m (7200-8200 ft) |
Distribution |
FL; GA; SC
|
TX; Mexico (Coahuila) |
Discussion | Of conservation concern. Shrublands and woodlands on limestone; of conservation concern; 2200-2500 m; Tex.; Mexico (Coahuila). Quercus carmenensis is known in the United States from only one collection from the Chisos Mountains, Texas; otherwise, it is known in the Sierra del Carmen region, Coahuila, Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 3. | FNA vol. 3. |
Parent taxa | Fagaceae > Quercus > sect. Quercus | Fagaceae > Quercus > sect. Quercus |
Sibling taxa | ||
Name authority | Sargent: Gard. & Forest 8: 93. (1895) | C. H. Muller: Amer. Midl. Naturalist 18: 847. (1937) |
Web links |