Sorbus hybrida
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Standard Cyclopedia of Horticulture |
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Sorbus hybrida, Linn. (Pyrus pinnatifida, Ehrh. P. fennica, Babington. S. intermedia x S. Aucuparia). Tree, attaining 40 ft., of regular, pyramidal habit, with upright branches: young branchlets and petioles whitish tomentose: lvs. ovate to oblong-ovate, with 1-4 pairs of decurrent lfts. at the base, or but pinnately lobed, upper part lobed with the lobes becoming gradually shorter and more indistinct toward the apex, dark green above, whitish or grayish tomentose beneath, 2 1/2 - 5 in. long; petioles about 1 in. long: fls. 1/3 – 1/2 in. across, in tomentose corymbs about 3 in. broad: fr. globose-ovoid, 1/2 in. high. May, June. H.W. 3, p. 86. S.I.F. 3:485—A form of narrow pyramidal habit is var. fastigiata, Hort. G.C. III. 42:185.—Natural hybrid, occasionally found with the parents in Eu. Two different hybrids are usually included under S. hybrida; the typical one is S. Aucuparia x S. intermedia, which has the lvs. oblong-ovate to oblong, 3-5 in. long, with 10-12 pairs of veins, the lfts. and lobes narrower and pointed and the veins often slightly recurved. It is mostly cult. under the name of S. quercifolia, or S. quercoides, Hort. The second hybrid is var. thuringiaca, Rehd. (Pyrus thuringiaca. Ilse. S. thuringiaca, Schneid.), and is a hybrid of S. Aucuparia x S. Aria; it has ovate to ovate-oblong lvs., somewhat less deeply lobed, 2 1/2-4 in. long, with 8-10 pairs of veins, lfts. and lobes broader and obtusish, with the veins usually curving upward. This is known in gardens as S. quercifolia hybrida nana. Var. decurrens, Koehne (S. decurrens, Hedl. S. lanuginosa, Hort., not Kit.), is a transition to S. Aucuparia; only the 3 or 5 upper lfts. are connate into a terminal lft., which, like the upper separate lfts., is decurrent at the base, under side less densely tomentose. In some nurseries under the name of S. sambucifolia. CH
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References
- Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963
External links
- w:Sorbus hybrida. Some of the material on this page may be from Wikipedia, under the Creative Commons license.
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