| Quercus glaucoides | |
| Author | Mart. & Gal. 1843 Bull. Acad. Roy. Sci. Bruxelles 10(1): 209 |
| Synonyms | baldoquinae Trel. 1924 Diagnosis
here cancellata Trel. 1924 Diagnosis here conjungens Trel.1924 Diagnosis here cordata Mart. & Gal. 1843 edwardsiae C.H.Muller 1942 glaucophylla Seemen ex Loes. 1900 harmsiana Trel.1924 Diagnosis here |
| Local names | encino
chaparro ; canyon oak ; smoky oak ; |
| Range | Center and
South-West Mexico ( |
| Growth habit | 3-8 m tall, trunk 25-40 cm wide; |
| Leaves |
8-12 x 4-7 cm, 2
times as long as wide; semipersistent; coriaceous;
oblong to oblanceolate; apex rounded, sometimes emarginate; base rounded
sometimes cordate slightly oblique; margin cartilaginous, not revolute,
usually undulate, entire or with 1-7 pairs of obtuse, broad, mucronate
teeth often turned to the foliar apex; blue green, dull, glabrous above
or with at base a sparse pubescence made of stellate trichomes; yellowish
green beneath, glabrous or seldom with scattered stellate trichomes
and glandular ones; 6-12 yellowish vein pairs, prominent on both sides,
more abaxially than adaxially; pruinose, glaucous, papillose epidermis;
petiole 2-6 mm, often dark reddish, glabrescent, pruinose; |
| Flowers | in April-May;
male catkins 2-3 cm long, bearing numerous flowers with pilose anthers;
|
| Fruits | acorn 1-1.8 cm, ovoid, brown; paired or to 3; subsessile or more often on a 1-6 cm long, glabrous peduncle; enclosed 1/3 or more by cup; cup turbinate or halfround with tomentose, tuberculate scales; cotyledons fused; maturing in 1 year from July to November; |
|
Bark, twigs and |
bark
scaly, dark grey; twig 1-3 mm thick, yellowish grey with numerous light
brown lenticels; bud 2-4 mm, ovoid conical, obtuse, dark brown; |
| Hardiness zone, habitat | not quite hardy; prefers calcareous, dry sites; |
| Miscellaneous | --
A. Camus : n° 201; -- Sub-genus Quercus, Section Quercus, Subsection Leucomexicanae, Group Glaucoideae; -- No hybrids known yet; -- Not to be confused with Q.glaucoides ( Schottky) Koidz. (= Q.shottkyana). -- For Susana Valencia-Avalos, 2004, Q.edwardsiae C.H. Mull 1942 (Amer. Midl. Naturalist 27: 472) is a separate species in Nuevo Leon; -- Easely recognized by its glaucous, dull and glabrous leaves, with entire or undulate margin or with 1-7 pairs of basally broad, mucronate teeth. |
| Subspecies and varieties |
-- Actually polymorphous leaves leading to the description of several forms, such as : f. lobata, f. longifolia, f. subrotundifolia |
| Pictures |
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