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Buckley's oak, Texas oak, Texas red oak
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Mexican blue oak, Sonoran blue oak
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| Trees, deciduous, to 15 m. Bark gray and smooth or black and furrowed. |
Trees, evergreen, to 10 m. Bark gray or whitish, closely furrowed. |
grayish brown to red-brown, rarely somewhat yellowish or gray, 1.5-3 mm diam., glabrous. |
light brown, 1-1.5 mm diam., densely or sparsely stellate-tomentose, soon glabrate. |
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reddish brown, subspheric to broadly ovoid, 1-2 mm, glabrous or basal scales pubescent; stipules persistent about terminal buds. |
blade circular or broadly elliptic to obovate, 55-100 × 51-112 mm, base cuneate to truncate, often inequilateral, margins with 7-9 lobes and 12-35 awns, lobes oblong to distally expanded, apex acute to acuminate; surfaces abaxially light green or coppery green, glabrous or with small, axillary tufts of tomentum, adaxially shiny or glossy, glabrous, veins raised on both surfaces. |
blade oblong to elliptic, occasionally lanceolate or ovate, (20-)30-60(-80) × (5-)10-25(-30) mm, base cuneate to cordate, margins entire, undulate, sometimes irregularly toothed especially toward apex, secondary veins 7-8(-10) on each side, branched, apex acute or broadly rounded; surfaces abaxially densely and loosely glandular-tomentose, quickly glabrate or persistently floccose, especially about base of midrib, at maturity strongly glaucous, adaxially dull pale green, bluish green, or glaucous, sparsely stellate-tomentose, quickly glabrate. |
biennial; cup goblet- to cup-shaped, rarely saucer-shaped, 5-11.5 mm high × 10-18 mm wide, covering 1/3-1/2 nut, outer surface glabrous to sparsely puberulent, inner surface glabrous except for a few hairs around scar, scales acute, less than 4 mm, occasionally tuberculate, especially at base of cup, tips appressed; nut broadly ovoid to broadly ellipsoid, rarely oblong, 12-18.5 × 8-14 mm, occasionally with faint rings of pits at apex, glabrous or sparsely puberulent, scar diam. 3.5-8 mm. |
solitary or paired, subsessile or on peduncle 4-12 mm; cup cup-shaped, about 6-8(-13) mm deep × 10-13 mm wide, enclosing ca. 1/3 nut, scales to 1-1.5 mm wide, moderately, regularly tuberculate near base of cup, gray-pubescent; nut light brown, ovoid or oblong, 12-17(-19) × (7-)10-12 mm, glabrate or puberulent about apex. |
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connate. |
buds grayish brown to reddish brown, ovoid to subfusiform, (2.5-)3-7 mm, scales on apical 1/2 distinctly ciliate. |
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| Flowering spring. |
Flowering in spring. |
| Limestone ridges and slopes, creek bottoms, occasionally along larger streams |
Common in high grasslands and midelevation woodlands, mesas, and canyons |
| 150-500 m (500-1600 ft) |
1300-1650 m (4300-5400 ft) |
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OK; TX
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AZ; NM; TX; Mexico (Baja California South, Sonora, Chihuahua, and Coahuila)
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For many years the names Quercus texana, Q. rubra var. texana, and Q. shumardii var. texana were erroneously used for Q. buckleyi (L. J. Dorr and K. C. Nixon 1985). Quercus texana reportedly hybridizes with Q. marilandica (= Q. ×hastingsii Sargent). Quercus ×hastingsii may be derived from Q. marilandica var. ashei (D. M. Hunt 1989). Hybridization with Q. shumardii may also occur (L. J. Dorr and K. C. Nixon 1985). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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| FNA vol. 3. |
FNA vol. 3. |
| Fagaceae > Quercus > sect. Lobatae |
Fagaceae > Quercus > sect. Quercus |
Q. acerifolia, Q. agrifolia, Q. ajoensis, Q. alba, Q. arizonica, Q. arkansana, Q. austrina, Q. berberidifolia, Q. bicolor, Q. boyntonii, Q. carmenensis, Q. chapmanii, Q. chihuahuensis, Q. chrysolepis, Q. coccinea, Q. cornelius-mulleri, Q. depressipes, Q. douglasii, Q. dumosa, Q. durata, Q. ellipsoidalis, Q. emoryi, Q. engelmannii, Q. falcata, Q. fusiformis, Q. gambelii, Q. garryana, Q. geminata, Q. georgiana, Q. graciliformis, Q. gravesii, Q. grisea, Q. havardii, Q. hemisphaerica, Q. hinckleyi, Q. hypoleucoides, Q. ilicifolia, Q. imbricaria, Q. incana, Q. inopina, Q. intricata, Q. john-tuckeri, Q. kelloggii, Q. laceyi, Q. laevis, Q. laurifolia, Q. lobata, Q. lyrata, Q. macrocarpa, Q. margarettae, Q. marilandica, Q. michauxii, Q. minima, Q. mohriana, Q. montana, Q. muehlenbergii, Q. myrtifolia, Q. nigra, Q. oblongifolia, Q. oglethorpensis, Q. pacifica, Q. pagoda, Q. palmeri, Q. palustris, Q. phellos, Q. polymorpha, Q. prinoides, Q. pumila, Q. pungens, Q. robur, Q. robusta, Q. rubra, Q. rugosa, Q. sadleriana, Q. shumardii, Q. similis, Q. sinuata, Q. stellata, Q. tardifolia, Q. texana, Q. tomentella, Q. toumeyi, Q. turbinella, Q. vacciniifolia, Q. vaseyana, Q. velutina, Q. viminea, Q. virginiana, Q. wislizenii |
Q. acerifolia, Q. agrifolia, Q. ajoensis, Q. alba, Q. arizonica, Q. arkansana, Q. austrina, Q. berberidifolia, Q. bicolor, Q. boyntonii, Q. buckleyi, Q. carmenensis, Q. chapmanii, Q. chihuahuensis, Q. chrysolepis, Q. coccinea, Q. cornelius-mulleri, Q. depressipes, Q. douglasii, Q. dumosa, Q. durata, Q. ellipsoidalis, Q. emoryi, Q. engelmannii, Q. falcata, Q. fusiformis, Q. gambelii, Q. garryana, Q. geminata, Q. georgiana, Q. graciliformis, Q. gravesii, Q. grisea, Q. havardii, Q. hemisphaerica, Q. hinckleyi, Q. hypoleucoides, Q. ilicifolia, Q. imbricaria, Q. incana, Q. inopina, Q. intricata, Q. john-tuckeri, Q. kelloggii, Q. laceyi, Q. laevis, Q. laurifolia, Q. lobata, Q. lyrata, Q. macrocarpa, Q. margarettae, Q. marilandica, Q. michauxii, Q. minima, Q. mohriana, Q. montana, Q. muehlenbergii, Q. myrtifolia, Q. nigra, Q. oglethorpensis, Q. pacifica, Q. pagoda, Q. palmeri, Q. palustris, Q. phellos, Q. polymorpha, Q. prinoides, Q. pumila, Q. pungens, Q. robur, Q. robusta, Q. rubra, Q. rugosa, Q. sadleriana, Q. shumardii, Q. similis, Q. sinuata, Q. stellata, Q. tardifolia, Q. texana, Q. tomentella, Q. toumeyi, Q. turbinella, Q. vacciniifolia, Q. vaseyana, Q. velutina, Q. viminea, Q. virginiana, Q. wislizenii |
| Nixon & Dorr: Taxon 34: 225. (1985) |
Torrey: in L. Sitgreaves, Rep. Exped. Zuni Colorado Rivers, 173, plate 19. (1853) |
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