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Juglans regia, linn. Persian or English Walnut. Round-headed tree, to 70 ft.: lfts. 5-13, oblong or oblong-ovate, acute or acuminate, almost glabrous, bright green, 2-5 in. long: fr. almost globular, green; nut usually oval, reticulate and rather smooth, rather thin-shelled. S. E. Eu. Himalayas, China. U. S. N. C. pi. 6. H.W. 2:36, pp. 87-9. M.D. 1911, p. 197(habit). Many varieties are cult, as fr. trees, for which see Walnut. var. sinensis, DC. (J. sinensis, Dode). Lfts. usually 5, larger, pubescent on the veins below: nut globose-ovoid, very rugose. China, Japan. S.I.F. 2:5. Of the ornamental varieties the most distinct and decorative is var. laciniata, Loud. (var. filicifolia, Hort. var. asplenifolia, Hort.), with narrow, pinnately cut lfts.; very effective as a single specimen on the lawn; remains usually shrubby. M.D.G. 1908:617. var. monophylla, DC., has the lvs. simple or 3-foliolate. var. pendula, Kirchn., has pendulous branches. Var. fSrtilis, Kirchn. (var. frulicosa, Dipp. var. prapar- turiens, hort.), is a shrubby variety producing rather small, thin-shelled nuts on very young plants. Var. Bartheriana, Carr. (var. elongata, Hort.). Nut elongated, narrow- oblong. R.H. 1859, p. 147; 1861, p. 427. Gn. 50, p. 478. var. corcyrensis, Sprenger. Lvs. large, to 2 ft. long; lfts. 9, the lowest pair very small, the upper pairs broadly ovate, about 8 in. long and 5 in. broad: nut rather thick- shelled. J. Duclouxiana, Dode, from the Himalayas and W.China with more elliptic and more acuminate lfts. and nuts with thin fragile shell, is probably only a variety of J. regia.
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