Oaks of the World

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 Quercus palmeri
AuthorEngelm. 1877
Synonymschrysolepis var. palmeri (Engelm.)Engelm. in Watson 1880
dunnii Kellogg ex Curran 1879
Local namesDunn oak ; Palmer's oak ;
RangeSW United States; Mexico; 1000-2400 m;
Growth habitreaches 5 m tall; often multiple trunks, looking like bush or thicket; stout, stiff branches;
Leaves 1.2-5 x 1-3 cm; persistent 3 years; elliptic or rounded; leathery; not convex; margin wavy, sometimes revolute, with 3-9 sharp teeth each side (among the spiniest of any oak species); grey green and glabrous above; minutely yellowish green tomentose beneath, with prominent veins; no stellate hairs below; 3-8 vein pairs; petiole 2-5 mm, round in cross section;
FlowersApril to July; 7-9 stamens;
Fruitsacorn 2-3 cm long; oblong to spindle-shaped; pointed, mucronate; enclosed 1/4 by cup; cup sessile or nearly so, thin, wider than nut, scales covered with orangish glandular hairs; maturing in 2 years, from August to October;

Bark, twigs and
buds

bark grey brown, scaly; young shoots often covered with orangish glandular hairs, becoming dark grey, smooth, glabrous, stiff; 1.5-3 mm in diameter; buds glabrous, rounded at apex, brown, 1-1.5 mm long;
Hardiness zone, habitatnot quite hardy (zone 7-8); prefers dry soils; produces thickets that are impenetrable by large mammals;
Miscellaneous-- A.Camus : n° 294;
-- "golden oak" (= subgenus or section
Protobalanus);
-- close to
Q.chrysolepis;
-- resembles
Q.cedrosensis that have less rounded, greener leaves, and conspicuous scales; resembles also
Q.chrysolepis whose cup is not wider than nut, and Q.turbinella whose leaves are smaller, with stalked acorns;
-- no known hybrids;
Subspecies and
varieties
 
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