Oaks of the World

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 Quercus cedrosensis
Author C.H.Muller 1962 Madroņo 16: 188 1962.
Synonyms 
Local namesCedros Island Oak
Range endemic to Baja California and to Cedros Island, in Mexico ; 300 - 1200 m ;
Growth habit dense bush, sometimes shrub to 2-4 m; prostate branches, layering spontaneously;
Leaves 0,6-2 cm; evergreen; clustered at the top of short stems; leathery; ovate to elliptic, sometimes oblong; convex; apex pointed; base rounded or slightly cordate; margins entire with 1-2 prickles each side, or with 2-5 pairs of prickly teeth; bright green and glabrous above; whitish or yellowish green and waxy beneath; 4-6 flat veins pairs, more marked beneath; epidermis papillar and bloomy; petiole 2-3 mm, almost hairless, reddish or yellowish;
Flowers male flowers in April-May, small, on short, loose catkins; female inflorescences 1-1.4 cm long with 5-10 flowers;
Fruits acorn 1.5-2.2 cm; elongated, pointed, enclosed 1/4 or 1/3 by the cup; cup stalkless with green, tomentose, basally thick, apically brown scales; maturing in 2 years;

Bark, twigs and
buds

young twigs hairy then glabrescent, reddish brown, 1-2 mm thick; bud very small;
Hardiness zone, habitat not hardy;
Miscellaneous -- "golden oak" (= Sub-genus Quercus, Section Protobalanus)
-- endangered species;
-- it shows a strong resemblance to the huckleberry oak (
Q.vaccinifolia); resembles Q.palmeri (that has larger and more rounded leaves, and acorn cup broader); resembles too Q.chrysolepis (both leaves and acorns are larger) and Q.dumosa (tomentose leaves undersides);
Subspecies and
varieties
 
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