Oaks of the World

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  Quercus bicolor
Author Willd. 1801 Neue Schriften Ges. Naturf. Freunde Berlin 3: 396 1801
Synonyms bicolor var. platanoides (Castigl.) A.DC 1864
bicolor var. cuneiformis Dippel 1891
bicolor var. angustifolia Dippel 1891
mollis Raf. 1938
paludosa Petz. & Kirchn. 1864
pannosa Bosc not Hand.-Mazz. 1864
platanoides (Castigl.) Sudw. 1893
prinus var. bicolor (Willd.) Spach 1841
Local names swamp white oak ; bicolor oak; blue oak;
Range NE U.S.A.; South Canada; 0 to 1000 m; introduced in Europe in 1800;
Growth habit reaches 20 m, and even more;
Leaves 8-20 x 5-11 cm; oboval; apex broadly rounded; base narrowly cuneate; 3-6 pairs of shallow lobes at apical 1/2; bright green and glabrous above; pale glaucous and slightly pubescent beneath (simple and stellate hairs), somewhat velvety; 3-7 pairs of secondary veins; orangish at fall; short petiole 0.4-2 cm;
Flowers  
Fruits acorn ovoid 2-3 cm long, singly or paired or to 3; cupule scaly, deep, enclosing 1/2 to 2/3 of nut, with appressed scales; long peduncle 2-7 cm; cotyledons distinct;

Bark, twigs and
buds

bark light grey, smooth, broken into plates; branchlet light brown or tawny, glabrous; buds brown, globose, 2-3 mm;
Hardiness zone, habitat hardy; prefers moist, lime-free soils; long-living;
Miscellaneous -- A. Camus : n° 189 ;
-- Sub-genus Quercus, Section Quercus ;
-- related to
Q.macrocarpa ;
Subspecies and
varieties
 
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