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| genus = Populas

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| species = alba

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Populas alba, Linn. (P. triloba and P. Morisetiana, Dode). White Poplar. Abele. Large much-branched tree, with whitish bark on the young branches becoming dark-colored and rough on the mature parts: lvs. much like those of P. grandidentata in form, but smaller, usually thicker and more angular, the under surface—especially early in the season—woolly white, in shape from broadly ovate to orbicular, irregularly short-lobed or sinuate, short-truncate or somewhat cordate at base: catkins short (mostly about 2 in. long, the males longer), sessile, with thin dentate or erose scales; stamens 6-10; stigma lincar-lobed. Eu. and  Asia.—The typical form of P. alba is less grown here than the varieties with lobed and very hite-bottomed (and sometimes variegated) lvs. In old places and yards it is sometimes found, but var. nivea and in newer grounds var. pyramidalis are more frequent. Var. globosa, Spaeth. Dense small tree or shrub, oval in outline of head: lvs. small, deltoid-cordate, slightly lobed, gray beneath and pinkish when young. Of horticultural origin. Var. pendula, Loud. Branchlets drooping: Var. Richardii, Hort. Lvs. yellow on upper surface.

Populas alba, Linn. (P. triloba and P. Morisetiana, Dode). White Poplar. Abele. Large much-branched tree, with whitish bark on the young branches becoming dark-colored and rough on the mature parts: lvs. much like those of P. grandidentata in form, but smaller, usually thicker and more angular, the under surface—especially early in the season—woolly white, in shape from broadly ovate to orbicular, irregularly short-lobed or sinuate, short-truncate or somewhat cordate at base: catkins short (mostly about 2 in. long, the males longer), sessile, with thin dentate or erose scales; stamens 6-10; stigma lincar-lobed. Eu. and  Asia.—The typical form of P. alba is less grown here than the varieties with lobed and very hite-bottomed (and sometimes variegated) lvs. In old places and yards it is sometimes found, but var. nivea and in newer grounds var. pyramidalis are more frequent. Var. globosa, Spaeth. Dense small tree or shrub, oval in outline of head: lvs. small, deltoid-cordate, slightly lobed, gray beneath and pinkish when young. Of horticultural origin. Var. pendula, Loud. Branchlets drooping: Var. Richardii, Hort. Lvs. yellow on upper surface.

Var. nivea, Wesm. (P. nivea, Willd. P. argentea, Hort. P. arembergiana, Hort.). This is the commonest form of white poplar in this country. It is known by the snow-white under surfaces of its foliage and the 3- or 5-lobed maple-like lvs. It is far too frequent about old yards, where its inveterate brood of suckers make it a perpetual nuisance. It is sometimes called "silver maple, from the resemblance of its foliage to that of the maple. As a street tree in cities it is particularly offensive, for the cottony covering of the under side of the leaves and of the shoots holds soot and dust, and it looks repulsively dirty. Useful for foliage effects in large plantings.

Var. nivea, Wesm. (P. nivea, Willd. P. argentea, Hort. P. arembergiana, Hort.). This is the commonest form of white poplar in this country. It is known by the snow-white under surfaces of its foliage and the 3- or 5-lobed maple-like lvs. It is far too frequent about old yards, where its inveterate brood of suckers make it a perpetual nuisance. It is sometimes called "silver maple, from the resemblance of its foliage to that of the maple. As a street tree in cities it is particularly offensive, for the cottony covering of the under side of the leaves and of the shoots holds soot and dust, and it looks repulsively dirty. Useful for foliage effects in large plantings.

Var. subintegerrima, Lange (P. subintegerrima, Dode. P. monticola, Brandegee. P. Brandegeei, Schneid.). Lvs. coriaceous, those on the long shoots ovate or orbicular, somewhat cordate or cuneate at base, nearly entire to somewhat toothed, white underneath; those on short shoots nearly circular, entire or slightly sinuate, gray underneath. Spain, N. Afr. Early intro. into Mex. and apparently naturalized in Low. Calif. G.F. 4:330; 6:190; 7:313 (descs.).

Var. subintegerrima, Lange (P. subintegerrima, Dode. P. monticola, Brandegee. P. Brandegeei, Schneid.). Lvs. coriaceous, those on the long shoots ovate or orbicular, somewhat cordate or cuneate at base, nearly entire to somewhat toothed, white underneath; those on short shoots nearly circular, entire or slightly sinuate, gray underneath. Spain, N. Afr. Early intro. into Mex. and apparently naturalized in Low. Calif. G.F. 4:330; 6:190; 7:313 (descs.).

Var. pyramidalis, Bunge (P. Bolleana, Carr. P. alba var. Bolleana, Lauche). Bolle's Poplar. Fig. 3126. A very tall narrow-topped tree, with cottony lvs. rather more deeply lobed (palmately 3-5-lobed) than those of var. nivea, those on the short shoots circular, coarsely triangular-toothed. The tree was intro. into Eu. from Asia in 1872 from Turkestan, and it was named for Dr. C. Bolle, an arboriculturist. It bears about the same relation to P. alba that the Lombardy poplar bears to P. nigra. Its fastigiate habit, combined with the white foliage and shoots, makes it a most emphatic tree, and there is great danger of planting it too freely. It is said to be much attacked by borers.

Var. pyramidalis, Bunge (P. Bolleana, Carr. P. alba var. Bolleana, Lauche). Bolle's Poplar. Fig. 3126. A very tall narrow-topped tree, with cottony lvs. rather more deeply lobed (palmately 3-5-lobed) than those of var. nivea, those on the short shoots circular, coarsely triangular-toothed. The tree was intro. into Eu. from Asia in 1872 from Turkestan, and it was named for Dr. C. Bolle, an arboriculturist. It bears about the same relation to P. alba that the Lombardy poplar bears to P. nigra. Its fastigiate habit, combined with the white foliage and shoots, makes it a most emphatic tree, and there is great danger of planting it too freely. It is said to be much attacked by borers.

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