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Quercus arizonica | |
Author | Sargent 1895 Gard. & Forest 8: 89 1895. |
Synonyms | arizonica
Wooton & Standl. 1924 arizonica var. wootonii Trel. 1924 endemica C.H.Muller 1942 sacame Trel. 1924 Diagnosis here |
Local names | Arizona white oak; napaco; |
Range | Arizona,
Texas, New Mexico; Mexico (Chihuahua, Coahuila, Durango, Sonora); 1300-2500
m; |
Growth habit | 8-12 m. but reaches 18 m, with a 1 m wide trunk; crown irregular; |
Leaves | 3-10 x 1.5-3 cm, evergreen; oblong; thick and leathery; elliptic to oblanceolate or oboval; apex obtuse or slightly pointed; base cordate or rounded; margin toothed except near base (1-6 teeth with a strong mucro at tip), revolute, sometimes almost entire; glaucous, very rough above with persistent, scattered, stellate hairs, and secondary veins not conspicuous; dull yellowish grey beneath, pubescent at first then glabrescent (curly stellate hairs), with raised veins; 7-11 vein pairs, straight or slightly curved; petiole 3-10 mm long; |
Flowers | male catkins 1.5-3 cm long, numerous flowers with 5-8 stamens; female inflorescences 1-2 cm long, with 2-6 pubescent flowers; |
Fruits | acorn 0.8-1.2 cm, light coffee coloured, glabrous, singly or paired (sometimes more) on a very short peduncle (0-1.5 cm), with often umbilicate stylopodium; enclosed 1/3 by half-round cup with tomentose scales, tuberculate at base; cotyledons connate; maturing in 5-6 months; |
Bark, twigs and |
grey bark very thick (to 2.5 cm), deeply furrowed; twig yellowish, with persistent fasciate tomentum; buds ovate 2-4 mm long, light brown, with scales pubescent at margin; stipules linear, 4-8 cm long, sometimes persistent. |
Hardiness zone, habitat | hardiness : zone 7; occurs in moister sites than Q.grisea; |
Miscellaneous |
-- Sub-genus Quercus, Section Quercus, Series Leucomexicanae;
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Subspecies and varieties |
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Pictures |
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