Oaks of the World

General data Classifications List of species Local names Back to
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  Quercus alba
Author L. 1753
Synonyms alba var. subflavea AL & MC Pickens 1960
alba var. subcaerulea AL & MC Pickens 1960
candida Steud. 1841
pubescens Willd. 1796, not Willd. 1805
ramosa Dippel 1891
Local names white oak ; eastern white oak ;
Range Eastern North America; 0 to 1600 m; introduced in Europe en 1724;
Growth habit reaches 25 m high, but only 15 m in Europe; spreading crown; at high elevations forms a low bush;
Leaves 8-20 cm long, 5-10 cm wide; elliptic, glabrous, with 3-9 pairs of untoothed lobes and more or less deep sinuses; base cuneate; dark green above, withish beneath; dark red midrib, 5-7 pairs of lateral veins; purple in autumn; petiole glabrous, yellow grey, sulcate on the lateral sides, reddish at fall, 1-2 cm long;
Flowers male flowers yellow green;
Fruits acorn 2-3 cm long, oblong, subsessile or short-stalked; enclosed for 1/4 of length in a shallow cup with warted, appressed and grey tomentose scales; cotyledons distinct; maturing in 1 year;

Bark, twigs and
buds

bark pale grey to whitish on old trees, with scaly plates; twigs green or reddish often downy, then grey, becoming glabrous; buds ovoid, dark brown, pointed, 3 mm long, with hairy scales;
Hardiness zone, habitat hardy; prefers acidic, well drained moist soils; long-lived, up to 200 years and more;
Miscellaneous -- A. Camus : n 278 ;
-- section Quercus ;
-- closely related to Q.bicolor and to Q.macrocarpa ;
Subspecies and
varieties
--- several forms :
_ elongata Dipp.
_ pinnatifida (Michx) Rehder 1949.
_ repanda (Michx) Trel. = Q.repanda Michx

--- and numerous hybrids = x bebbiana, x jackiana, x saulii , x bimumdorum, x deami, x faxonii;
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