Oaks of the World

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  Quercus phellos
Author L. 1753
Synonyms phellos var. viridis Aiton 1789
phellos var. sylvatica Michx. 1801
phellos var. humilis Pursh 1814
salicifolia hort. not Née
Local names willow oak ;
Range southeastern U.S.A.; 0-400 m; introduced in Europe in 1723;
Growth habit 15-30 m tall; crown dense, rounded; trunk short, to 1.6 m in diameter;
Leaves 5-13 x 1-2.5 cm; lanceolate; limp; margin entire, untoothed, sometimes wavy; apex pointed and mucronate; base cuneate; pale green above; sometimes pubescent beneath; young leaves yellow; midrib raised; petiole hairless, 2-5 mm long;
Flowers  
Fruits acorn 1 cm in diameter, ovoid or subglobose; singly or paired; apex pointed; yellow brown, sometimes striate; cup shallow, covering 1/4 to 1/2 of nut, thin, greenish brown; maturing in 2 years;

Bark, twigs and
buds

bark grey, smooth, becoming blackish, rough, furrowed; twigs brown, hairless, slender; buds ovoid, hairless, pointed, rusty brown, 2-4 mm long;
Hardiness zone, habitat hardy; prefers wet soils; fast growing;
Miscellaneous -- A. Camus : 410
-- section Lobatae ;
-- numerous hybrids, among them : x
giffordi Trel. with Q.ilicifolia, x ludoviciana Sarg. with Q.pagoda ;
Subspecies and
varieties

--- var. pumila (Walt) Michx. 1803
see
Q.pumila

-- Q.phellos 'Latifolia', with leaves sometimes lobed in the middle and with tomentum beneath, possibly is a hybrid with Q.incana.

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