Oaks of the World

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  Quercus lobata
Author Née 1801 Anales Ci. Nat. 3: 277

Diagnosis here
Synonyms hindsii Benth. 1844
lobata var. turbinata Jepson 1909
lobata var. walkeri Jeps. 1909
lobata var. hindsii (Benth.)
Wenz. 1884
longiglanda Torr. & Frémont 1848
Local names mush oak ; valley oak ; El Roble ; California white oak ;
Range California (including Channel Islands); to 1200 m, in warm, moist valleys;
Growth habit 10-15 m; may reach 30 m, with a short trunk to 2 m and more in diameter; weeping at the end of branches; crown spreading; stout branches;
Leaves 5-10 x 3-6 cm; 7-11 lobes each side, with shallow sinuses; margin not toothed; base cuneate; shiny dark green above with some stellate hairs; pale green or whitish, tomentose beneath, with numerous stellate hairs; 5-10 vein pairs; petiole 0.6-1.3 cm long;
Flowers male flowers on catkins 2.5-7.5 cm long;
Fruits acorn 3-6 cm long, narrow, pointed; subsessile; singly or paired; cup with warty, pilose scales, covering 1/3 of nut or less; maturing in 1 year; edible;

Bark, twigs and
buds

bark thick, furrowed, light grey, broken into square plates; twig yellowish grey, sometimes reddish, slightly tomentose; buds pale brown, ovoid, 3-5 mm long, pointed, densely pubescent;
Hardiness zone, habitat hardy; prefers acidic, rich, deep soils; slow-growing; trunk is often covered with lichen (Ramalina reticulata) ;
Miscellaneous -- Sub-genus Quercus, Section Quercus, Series Lobatoid;
-- A.Camus : n° 266;
-- Some hybrids, with
Q.douglasii ( = x jolonensis), Q.turbinella ( = x munzii), Q.dumosa ( = x townei);

Subspecies and
varieties
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