Populus nigra
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| Water: | ◍ | ?"?" is not in the list (wet, moist, moderate, dry, less when dormant) of allowed values for the "Water" property. |
Read about Populus nigra in the Standard Cyclopedia of Horticulture
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Populus nigra, Linn. Black Poplar. Tree of medium to large size, with smooth twigs and lvs. somewhat resembling those of the cottonwood, but generally smaller and much less deeply toothed, longer in proportion to their width and often with a tapering or rounded base, with no cilia or hairs on margin and no basal glands; lf.-stalk much flattened, so that the foliage moves freely in the wind: stamens 12-25; stigmas and placentae 2. Eu., Siberia.—The tree usually has a pyramidal habit of growth and a dark cast to the foliage. It is a less lustrous tree than the cottonwood and grows more slowly. Var. betulifolia, Torr. (P. betulifolia, Pursh. P. nudsonica, Michx. P. nigra var. hudsonica, Schneid.), has the young growth and the petioles downy. B.M. 8298. Specimens of this plant were found along the Hudson by Michaux, who thought it an American species and published it early in the century as Populus hudsonica. Pursh, in 1814, published it again as the "birch-leaved poplar," Populus betulifolia, from trees found near Lake Ontario. Although it was found half wild in N. Y. about a century ago, it does not appear to have increased itself in Amer., and the variety is probably of European origin. P. nigra is rarely seen, even in cult, grounds. It is sometimes spontaneous in the E. Variable in cult, and grown in European collections under a variety of names. With the exception of var. italica, these forms are little known in this country. P. vistulensis, Dode, is a form of moderately strong growth; branches spreading: lvs. rhomboidal, dark green. The two main forms or types of the black poplar are the glabrous or smooth (var. typica, Schneid.), S. Eu., and the pubescent (var. betulifolia). The English or downy black poplar makes a wide-spreading attractive large tree, and forms great burs on its trunk. Var. elegans, Bailey (P. elegans of nurserymen, and probably some one of the well-known European forms), is a tree of pronounced strict or pyramidal habit, but considerably broader than the Lombardy poplar, with thinly pubescent twigs and petioles: foliage small and light-colored and very versatile in a breeze, with a handsome reddish tint to the lf.-stalks and young shoots. It is worth growing in every well-kept place, especially if placed against a planting of heavier foliage. Populus canescens of some American nurserymen (not of botanists) is very like this, although it has less color and brightness. P. charkowiensis, Schroed., is probably a hybrid in this group, by some supposed to be Lombardy poplarxP. nigra; apparently allied to P. Eugenei. Var. Viadri, Aschers. & Graebn. Tree narrow-pyramidal with ascending branches: lvs. like those of P. nigra but more cuspidate. P. afghanica, Schneid. (P. nigra var. afghanica, Aitch. & Hemsl.), of Afghanistan, has exceedingly slender branches very small lvs. Not in cult. in this country.nigra Var. italica, Du Roi (var. pyramidalis, Spach. P. italica, Moench. P. dilatata, Ait. P. fastigiata, Poir. P. pyramidalis, Borkh. P. pyramidata, Moench. P. sinensis, Dode). Lombardy or Italian Poplar. Figs. 3132, 3133. Differs from the typical black poplar (P. nigra) in its tall narrow growth, glabrous young shoots, a confirmed habit of suckering from the root and generally a more tapering base to the lvs.: buds small: lower branches of the head taking a strong upward direction so that it has no hanging or drooping spray; holds its green foliage late in autumn. It is a staminate sport from P. nigra var. typica, originating in the plains of Lombardy about 1700-20 and now widely spread over the world by means of cut- tings. Pistillate Lombardies have been reported but they are of different origin and are usually broader-headed trees. With age, the Lombardy poplar becomes one of the most striking and picturesque trees, particularly when some of the sprouts are allowed to grow about the old stock, as in Fig. 3133. In the northernmost states it is not long-lived. P. thevestina, Dode, from Morocco, is apparently a form of the Lombardy poplar type with whitish or gray bark: tree very large: lvs. very large, almost triangular, toothed, shining, with carmine petioles. nigra Var. plantierensis, Schneid. (P. plantierensis, Dode). Similar to Lombardy poplar but with reddish pubescent petioles and short-pubescent branchlets. Of horticultural origin, in the nursery of Simon-Louis at Plantieres, near Metz, France. This is the fastigiate form of P. nigra var. betulifolia; probably not in commerce in this country. Both sexes are known. CH
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References
- Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963
External links
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