View source for Quercus Robur

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Quercus robur, Linn. (Q. pedunculata, Ehrh. Q. femina, Mill. Q. Robur var. pedunculata, DC.). English Oak. Figs. 3314, 3315. Tree, to 120 ft., with stout spreading branches forming a broad round-topped head: lvs. short-petioled, auriculate at the base, oblong-obovate, with 3-7 rounded lobes on each side, quite glabrous, dark green above, pale bluish green beneath, 2 1/2-5 in. long: fr. 1-7 on slender peduncles; acorn ovate or ovate-oblong, about 1 in. high, embraced about one-third by the hemispherical cup. Eu., N. Afr., W. Asia. G.C. III. 24:201; 25:168. F.S.R.2,p. 196. G.W.13,p.566. H.W. 2:21, pp. 53-5. F.E. 21:100 (pl. 114).—More than 40 varieties are cult. in European nurseries and collections; some of the most important are the following: Var. Concordia, Schneid. (Q. pedunculata Concordia, Kirchn.). Lvs. bright yellow. I.H. 14:537. F.E. 13:1296 (pl. 19). Var. contorta, Hort. A form with twisted branches and crowded lvs. of irregular shape; of slow growth. Var. fastigiata, Schneid. (Q. pedunculata fastigiata, DC.). With upright branches forming a narrow columnar head. G.C. II. 19:179; III. 41:149. G.W. 15:663. F.E. 13:416 (pl. 3) (as var. Lucombeana). Of the same habit are var. fastigiata cupressoides, Hort., with narrower lvs. Var. fastigiata aureo-punctata with yellowish spotted foliage. var. fastigiata viridis with lvs. of darker green. Var. heterophylla, Rehd. (Q. pedunculata heterophylla, Loud. Q. Robur var. laciniata, Schneid., var. comptoniaefolia, Hort.), with narrow, elongated, slightly or crenately lobed, sometimes almost entire lvs. Var. filicifolia, Schneid. (var. asplenifolia, var. Doumetii, Hort.). Fig. 3316. Lvs. deeply and irregularly divided often almost to the midrib in narrow linear lobes, with crisp margins. G.C. II. 14:632. I.H. 1, black fig., not numbered, opposite pl. 33. R.H. 1894, p. 17. Var. pectinata, Schneid. (Q. Robur var. pectinata, Kirchn.). Lvs. regularly pinnately divided nearly to the midrib into linear lobes. Var. pendula, Schneid. (Q. pedunculata pendula, Loud.). With pendulous branches; a form with more slender and more decidedly weeping
branches is var. Dauvessei, Hort. Var. purpurascens, DC. (Q. pedunculata purpurascens,
DC., var. purpurea, Loud. Q. Robur sanguinea, Schneid.). With the lvs. bright purple
when young, becoming almost green at length, or as in the forms distinguished as var.
atropurpurea, Schneid., and var. nigra, Hort., the color is more intense and retained
through the whole summer. F.S. 17:1783, 1784. There are a number of variegated forms, but of no great ornamental value; the most often cult. are: albo-variegata, argenteo-marginata, argenteopicta, aureo-variegata, marmorata, joreauensis maculata, tricolor.—Hybrids between this species and the following occur occasionally in Eu. (Q. rosacea, Bechst. Q.
hybrida, Bechst., not Brot.). For a hybrid with Q. montana, see No. 24.
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==Cultivation==
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===Propagation===
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===Pests and diseases===
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==Species==
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==Gallery==
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==References==
*[[Standard Cyclopedia of Horticulture]], by L. H. Bailey, MacMillan Co., 1963
<!--- xxxxx  *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381  -->
<!--- xxxxx  *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432  -->
<!--- xxxxx  *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608  -->

==External links==
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