| Quercus glabrescens | |
| Author | Benth. 1840 Pl. Hartw. 56, 348 |
| Synonyms | glabrescens
var. integrifolia Liebm. 1864 arachnoidea Trel. 1924 martensiana f. berlandieri Trel. 1924 |
| Local names | quebracho; |
| Range | Mexico (Oaxaca,
San Luis Potosi, Hidalgo, Mexico, Distrito Federal, Tlaxcala, Veracruz);
2500-3400 m; introduced in England by Hartweg in 1839; |
| Growth habit | 3-4 m tall usually,
but may reach to 15 m; |
| Leaves |
4-10 x 1.5-4 cm; deciduous; stiff, subcoriaceous to coriaceous; oblanceolate, elliptic or obovate; 2-2.5 times longer than wide ; apex acute or obtuse, with mucronate tip; base rounded or cordate, sometimes cuneate; margin cartilaginous, slightly revolute, crenate or dentate with apically 3-5 pairs of mucronate teeth; shiny dark green, rugose and glabrous above except few stellate hairs on midrib; paler beneath, glabrous or with some fasciculate, sessile hairs with crispate rays; 10-14 rather straight vein pairs, impressed above; epidermis lustrous, papillose, sometimes slightly bullate, rarely flat, with prominent veins beneath; petiole 3-10 mm long, glabrescent or covered with sessile fasciculate hairs and acicular unicellular ones, appressed ; |
| Flowers | in February to May; staminate catkins 2 cm long, with 20-30 flowers; pistillate catkins 1-1.8 cm long, 1 to 3-flowered, with glabrescent rachis; |
| Fruits | acorn mucronate,
ovoid, 1.6-2.1 cm long, 1.3-1.7 cm in diameter; solitary or to 3 together,
sessile or on a glabrous, 4-5 mm long stalk; enclosed 1/3 by cup; cup
brown tomentose, 1-2 cm in diameter, without warty scales; |
|
Bark, twigs and |
grey
bark peeling into square, thin plates; twigs 1-2.5 mm wide, scarcely pubescent,
coffee-coloured with evident pale yellow lenticels; bud ovoid to round,
2.5-3 mm long, glabrous or remotely pubescent near base, ciliate along
margin, ovatel scales |
| Hardiness zone, habitat | hardy;
all types of soils, prefers moist ones; cultivated in Holland; |
| Miscellaneous | --
A. Camus : n° 211; -- Sub-genus Quercus, Section Quercus, Series Leucomexicanae; -- Possible confusion with Q. lancifolia, which has narrower leaves (2.5-3.5 times longer than wider) with the adaxial surface not rugose. |
| Subspecies and varieties |
var.
radlkoferiana (Trel.) A.Camus 1935 (A. Camus : n° 212) = Quercus radlkoferiana Trel. 1924 Diagnosis here less than 3 m tall; Oaxaca, Mexico, Veracruz; |
| Pictures |
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