| Quercus laceyi | |
| Author | Small 1901 Bull. Torrey Bot. Club 28: 358 |
| Synonyms | breviloba f. laceyi
(Small) Trel. 1924 breviloba subsp laceyi (Small) A.Camus 1939 glaucoides Auctores not Mart. & Gal. 1843 |
| Local names | Lacey oak; |
| Range | N.E.
Mexico (Nuevo Leon, Coahuila, Tamaulipas); S.E USA : West Texas (Edwards
Plateau); 350 to 2200 m; |
| Growth habit | reaches 8 m. tall; |
| Leaves | 3-7(-10) cm x 2-5(-8); deciduous; relatively thin; elliptic or oboval; apex rounded or obtuse, retuse; base round or slightly cuneate and decurrent, seldom somewhat cordate; margin flat, thin, not cartilaginous, wavy-crenate, slightly revolute, with 1-4 rounded, minutely ucronate lobes each side, seldom entire or dentate; young leaves reddish and with white glandular hairs both sides; mature leaves grey-green or sometimes yellewish green above, not lustrous, hairless or with some stellate trichomes along midrib; paler beneath, glabrous or with some white glandular trichomes; 6-9 yellowish vein pairs, flat or slightly raised both sides; epidermis papillose; petiole 2-12 mm long, thin, glabrescent; |
| Flowers | male flowers with glabrous yellow anthers, numerous on 1-2 cm long catkins; female inflorescences 3 cm long, 1-5-flowered distally; |
| Fruits | acorn 1.2-1.8 cm long, oblong or barrel-shaped, often flattened at apex, brown; 1 to 2 together; stalkless or subsessile with a peduncle rarely if ever exceeding 1 cm long, in the axils of the leaves; enclosed 1/3 or less by cup; cup saucer-shaped or shallowly cup-shaped, with slightly tomentose scales, thickened at base but not strongly tuberculate; cotyledons free; maturing in 1 year from August to October; |
|
Bark, twigs and |
bark furrowed, thick, dark grey; twig 1-3 mm thick, yellowish grey with numerous light brown inconspicuous lenticels; bud 2.5 mm, ovoid, conical or globose, dark brown, sparcely hairy; stipules deciduous, grooved; |
| Hardiness zone, habitat | hardy; prefers calcareous, dry sites; withstands heavy clay soils; |
| Miscellaneous | -- A. Camus : n°
246; -- Sub-genus Quercus, Section Quercus, Series Polymorphae; -- Howard Lacey discovered it near his ranch at Kerville (Texas), in 1872; -- Possible confusion with Q. glaucoides, but this species grows only in Center and South-West Mexico, has coriaceous leaves, 2-5 mm long thick petioles, foliar base cordate, acorn subsessile or on a stalk to 8 cm, cotyledons marginally fused, anthers pilose. -- Possible confusion as well with Q. porphyrogenita (see this file). |
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| Pictures |
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