Several varieties of poplar are found in the upper canyons, and trees of the willow-leaved species in the Humboldt Mountains often attain a height of 60 ft.
There are poplar and cedar and pine and oak and ash and hickory and maple trees.
The soil is very fertile; wheat, Indian corn, olives, vines, fruit trees of many kinds cover both the plain and the surrounding hills; the chief non-fruit-bearing trees are the stone pine, the cypress, the ilex and the poplar, while many other varieties are represented.
The principal trees are the alder, aloe, palm, poplar, acacia, willow and eucalyptus.
Among the most important trees of this area are the white and chestnut oaks, the black walnut, the yellow poplar, and the cherry, the southern portion of the state containing the largest reserve supply.
In north and central Franee the chief trees are the oak, the beech, rare south of the Loire, and the hornbeam; less important varieties are the birch, poplar, ash, elm and walnut.
The timber is much used in some rural districts for flooring, and is durable for indoor purposes when protected from dry-rot; it has, like most poplar woods, the property of resisting fire better than other timber.
The native country of this form has been much disputed; but, though still known in many British nurseries as the "black Italian poplar," it is now well ascertained to be an indigenous tree in many parts of Canada and the States, and is a mere variety of P. canadensis; it seems to have been first brought to England from Canada in 1772.
The true balsam poplar, or tacamahac, P. balsamifera, abundant in most parts of Canada and the northern States, is a tree of rather large growth, often of somewhat fastigiate habit, with round shoots and oblong-ovate sharp-pointed leaves, the base never cordate, the petioles round, and the disk deep glossy green above but somewhat downy below.
The maple, walnut, oak, ash, beech, elm, gum, sycamore, hickory and poplar, found on the southern slope of the Osage highlands, on the uplands about the source of the highlands and in the central portions of the Red river valley, are valuable for cabinet woods.
The principal trees are the oak, the valonia oak, the beech, ash, elm, plane, celtis, poplar and walnut, which give way in the higher regions to the pine and fir.
Among deciduous trees the state is noted for its sugar maples; birch and beech are common on the hills, and oaks, elm, hickory, ash, poplar, basswood, willow, chestnut and butternut on the less elevated areas.
A closely related form is the well-known Lombardy poplar, P. fastigiata, remarkable for its tall, cypress-like shape, caused by the nearly vertical growth of the branches.
The Lombardy poplar is valuable chiefly as an ornamental tree, its timber being of very inferior quality; its tall, erect growth renders it useful to the landscape-gardener as a relief to the rounded forms of other trees, or in contrast to the horizontal lines of the lake or river-bank where it delights to grow.
The most conspicuous case, perhaps, of all these is the mistletoe, which flourishes luxuriantly upon the apple, the poplar and other trees.
The molten sulphur accumulates on the sole, whence it is from time to time run out into a square stone receptacle, from which it is ladled into damp poplar-wood moulds and so brought into the shape of truncated cones weighing 110 to 130 lb each.
Two half-hearted attempts were made on the 7th and 10th of March, at Poplar Grove and Driefontein, to stem Lord Roberts's advance upon Roberts's Advance.
The company possesses running powers over the lines of various other companies: thus its trains run as far north as Potter's Bar on the Great Northern line, while it serves Richmond on the west and Poplar on the east.
Beavers also gnaw the bark of birch, poplar and willow trees; but during the summer a more varied herbage, with the addition of berries, is consumed.
The most valuable trees for lumber are spruce, white pine, hemlock, cedar, white birch, ash, maple and basswood; all excepting pine and hemlock and poplar in addition are ground into wood pulp for the manufacture of paper.
The tulip tree produces a good clear lumber known as white wood or poplar, and is also a source of pulp. In the south both white and yellow pine abounds.
Forests of conifers (Picea obovata) and deciduous trees - Przhevalsky's poplar, birch, mountain ash, &c., and a variety of bushes - are common everywhere.
Among the more common trees are several species of oak, pine, hickory, gums and maple, and the chestnut, the poplar, the beech, the cypress and the red cedar; the merchantable pine has been cut, but the chestnut and other hard woods of West Maryland are still a product of considerable value.
Extensive forest areas still remain both in the east and the west, In the east oak, maple, beech, chestnut, elm, tulip-tree (locally " yellow poplar "), walnut, pine and cedar trees are the most numerous; in the west the forests are composed largely of cypress, ash, oak, hickory, chestnut, walnut, beech, tulip-tree, gum and sycamore trees.
The trees most commonly found are the plane, poplar, maple, walnut, oak, the Cupressus funebris, and various varieties of the genera Pinus, Abies and Larix.
The western division consists of low fen or clay soil and presents a monotonous expanse of rich meadow-land, carefully drained in regular lines of canals bordered by stunted willows, and dotted over with windmills, the sails of canal craft and the clumps of elm and poplar which surround each isolated farm-house.