Poplars are very fast-growing trees of the Willow family that are gaining height and leaf mass. Trees grow very quickly the first 15-20 years of life, but quickly grow old and die. When poplar is in bloom, some people enjoy a white poplar blizzard in the midst of a hot summer, and some suffer from allergies. All kinds of poplars purify the city air. On the earth there are several dozen species of poplars, many of them hybrids grown by the efforts of dendrologists.
Balsamic
Balsamic poplar lives in Canada and North America. The usual height of a tree is 17–20 m, old fifty-year-old trees often reach a height of 30 m.
The diameter of the spreading poplar crown - 10-12 m, a thick trunk is difficult to embrace two people, since its diameter can be up to two meters. At the base of the trunk, the bark of the plant is dark, uneven, in bursting, gnarled furrows, higher along the trunk begins the elastic smooth skin of a white-gray shade. 
The branches are covered with leaves 5-14 cm long and 4-7 cm wide leaf. The shape of the leaves is rounded at the stem and wedge-tapering to a sharp tip; the leaves are covered with a fine-toothed relief along the edge.
The leaf is smooth, with a cool leathery surface and a long dense petiole (2-2.5 cm), the upper part of the leaf is shiny, dark green, the color of the bottom plate is gray-green, very light, the skeletal base of the sheet structure is clearly visible from the bottom.
The buds thrown out in the spring are large, elongated, up to 2 cm high. The buds and the newly unfolded young leaves are sticky from the sticky resin coating covering them with a pleasant aroma.
The plant is deciduous, with the onset of autumn changing the color of the crown from gray-green to yellow, dropping the leaf cover and re-expanding it in the spring. It flowers in May, with long, hanging brown earrings covered with yellow pollen.
Did you know? Forests consisting only of poplar trees are called poplar trees.The length of female flowers (earrings) is 13-15 cm, men's earrings are slightly shorter (6 - 9 cm). Flowering earring has up to four carpels.
It grows very fast in height, but wood is often exposed to diseases and is unstable to pests. The maximum life of the plant is up to 150 years, but usually the tree deteriorates after 80 years, the plant does not freeze out even at -45 ° C.White (silver)
Silver poplar grows in Europe and Central Asia. It also includes the names: snow-white poplar or Bolle poplar. The plant belongs to the Willow family, the average height of the plant reaches 30 m, in rare cases the tree grows up to 40 m high.
Another representative of the Willow family is Willow. Learn more about its most popular species such as: goat, "Hakuro Nishiki", weeping, dwarf, globular willow.
The giant has a life expectancy of 65 to 400 years; the long-liver has a short but wide trunk. The thickness of the giant trunk reaches 2-3 m. Cap poplar tent-shaped or pyramidal shape. Branching of the trunk begins 2-3 m from the ground.
The plant has a smooth gray bark, in some cases, the shade of wood cover is gray-green. A very old tree changes the light color of the bark to almost black. On the young shoots there is a whitish patina, the shape of the shoots is round, low-leaf.
Silver has small buds, the height of the finished kidney is no more than 0.5 cm. On adult branches, the kidneys are smooth, not covered with sticky bloom. Young branches have sticky buds and sticky young foliage. 
The giant young shoots grow deltoid leaves, the crown is covered with rounded leaves, the upper part of which has a green color, the lower part of the leaf is light silver.
When flowering branches are covered with elongated buds, earrings. Inflorescences - thick, soft and terry. Male inflorescences are brownish or dark red, female inflorescences are light yellow. The length of women's earrings reaches 12 cm, the length of men's earrings is about 7 cm in length.
When the flowering period passes, fruits appear on the silver poplar. This is a brown, dry box that opens, showing seeds in it. Sunflower seeds look like lightweight, weightless cotton wool.
They are small, brown, in the form of a blade. In the lower part of the seeds are covered with thin and fluffy cobweb-like hairs. Their wind spreads far from the uterine tree. So poplar multiplies. Flowering begins in mid-May, and the seeds (poplar fluff) ripen in late June or mid-July. 
Important! Poplar seeds ripen well when the male and female trees grow nearby.
Berlin
Berlin's poplar is a hybrid bred from a laurel poplar and black poplar. It has solid, durable wood, which is used for the construction of houses and cultural management of forest and park management.
Berlin poplar is not found in the wild. This tree grows to a maximum of 35 m. The crown of the plant has a broad base and a pyramidal, tapering crown, formed from thin skeletal branches. 
The lower part of the tree is covered with cracked coarse bark, a little higher along the trunk the bark of the tree becomes gray and smooth. Young shoots have a gray-olive color, have a slightly ribbed surface. Growing up and gaining thickness, young branches become rounded in diameter.
The buds of the Berlin poplar are rather large, rounded with a sharp vershinka. Light green leaves have an ovoid shape with a sharp wedge-shaped tip. The leaf surface is dark green, the bottom of the sheet is almost white.
The length of the leaf plate is 10-15 cm, width is 6-7 cm. Berlin poplar spreads leaves at the beginning or in the second half of May, throws out inflorescences in the form of long, fluffy earrings that ripen in late June.
Did you know? In the XIX century in the construction of railways in Russia, poplar was used in the manufacture of railway sleepers.
Fragrant
Poplar fragrant grows throughout Eastern Siberia, its birthplace is the Far East. A tree grows along floodplains of rivers, on the banks of taiga lakes, sometimes forming poplar groves without admixture of other trees. In the cities of Russia, poplar avenues plant trees and railway stations, city avenues and streets.
A huge tree has a height of up to 20 m, sometimes there are arboreal giants up to 25 m high. The branches of the tree are located at an angle of 70 ° relative to the trunk of the tree.
These branches form a neat oval-shaped crown with a diameter of up to 15 m. Young branches have a smooth yellowish or greenish-gray skin, aging with age, the skin on the shoots coarsens and becomes covered with cracks.
The older the tree, the rougher the breaks in the burst bark. The tree is not demanding on the soil on which it grows, it feels equally good both on black soil and in clay soils. It tolerates frosts to -40 ° C. 
Quite demanding of air humidity, it reacts negatively to long-term droughts. The leaves of fragrant poplar are oval, with a conical pointed tip, the usual size of a leaf is from 6 to 10 cm in length, 5 cm in width.
The leaves are firm, leathery, the skeletal structure of the leaf is clearly visible in the form of thick veins, the edges are slightly toothed, finely cut. The color of the leaf plate ranges from light olive to not bright green, turning the plate upside down you can see that its color is light gray, almost silver.
The leaves are firmly attached to the branches, slightly pubescent petiole (3-4 cm long). Men's earrings are short, their length is not more than 2 cm, of a reddish hue.
Female inflorescences grow in length up to 5-7 cm, in female earrings a pistil with a three-part column and an egg-shaped stigma is formed. Fruit boxes consist of four wings, elongated, oval.
Plants bloom almost simultaneously with the blooming of young foliage, full bloom occurs closer to the middle of June. 
Young plants develop very quickly, gaining height and width of the crown. In Siberia and the Far East, these trees live up to 200 years, growing in the cities of poplar often live only up to 25-30 years, after which they fall ill and dry.
This species of poplar is well propagated by far-blown seeds or green cuttings (rooting up to 90%).
Canadian
Canadian poplar is a man-made hybrid of Canadian breeders, very similar to the deltoid poplar.
Very tall tree (30-40 m) with a wide crown. The width of the crown is formed by sprawling powerful branches with rough and gray bark. In the spring the tree is covered with large, oblong, brown buds covered with gluten.
The leaves of the Canadian poplar are almost triangular (width 7-10 cm, height 7 cm), broad and even at the base, sharply tapered at the tip of the leaf, have a slightly toothed margin. The leaves are kept on a short red cutting, the stem is up to 3 cm long.
The Canadian poplar blossoms with long friable inflorescences, male red-brown (up to 10 cm) and female light yellow or yellow-green (12-14 cm). Poplar earrings appear even before the leafing, when the young buds are swollen. Usually, this species of poplar blooms in April. 
After flowering, fruits form, 2 or 4 folding, beige boxes, in which I ripen small seeds in the form of a propeller. The ripened box bursts and the seeds fly apart, far carried away by the wind.
Some people have an allergy to poplar fluff, it is accompanied by reddened eyes and a runny nose. Seeds can be separated from the parent plant for tens of kilometers.
Canadian poplar is the largest (tallest and widest) species in the poplar family. Its wood is used in the furniture industry, in the construction of residential buildings.
Canadian poplar planted for landscaping streets, parks, squares, poplar alleys can be seen along the highways between cities.
Important! The perfumery industry uses poplar buds as plant material for the production of aromatic products. The reason for this is the content of essential oil in the kidneys.
Large leaf
Large-leaved poplar, it is Ontarian or Aurora, a very beautiful, spectacular plant with large leaves. In European countries, this tree grows up to 10 m in height, with our frosty winters it is significantly shorter.
When this tree freezes, and its branches die off, a pair of new shoots are formed at the tip of each branch. As a result, the crown of this low poplar is very lush, the ends of the shoots are decorated with large sheets on which cream spots are clearly visible.
This cream color makes the large-leaved poplar very decorative, in the middle of summer the leaf color changes to light green. The length and width of the sheet reaches 10 cm.
The tree is unstable to frost and from that is short-lived. The average lifespan of this plant is 65 years. 
Planting poplar Aurora is advisable in places protected from cold northern winds, the tree needs abundant sunlight, the city does not depress the plant gassed.
Chinese
Chinese poplar is often a multi-stem tree with a pyramidal top. The height of the plant is up to 15 m, the main skeletal branches of the poplar grow upwards at an acute angle to the trunk, thereby giving a handsome crown a pyramid shape.
Young shoots are clearly ribbed, the tree bark is painted both on young shoots and on the main trunk of gray-green color.
Ellipsoid, rounded leaves strongly elongated to the tip (13x7 cm), with a rugged relief edge. The upper color of the leaves is light green, the lower part is gray or silver, in windy weather they create a very decorative effect of amazing silver trees.
The tree is very frost-resistant, it feels great at temperatures up to -40 ° C, it is widespread in the Far East and in China. Sheet mass falls after the first frost. 
Plants do not need pruning, the crown is formed naturally, it is very demanding of moisture, with a lack of watering can lose the leaf cover.
A young tree can grow from self-sown seeds, but the most reliable method of propagation is green cutting with subsequent planting of the cut cuttings in moist soil.
After 2 years, grown seedlings are transplanted to a permanent place; young trees need shading from direct sunlight and regular watering.
An adult tree is considered only after 5 or 6 years. The type of this poplar is used for creation of live green hedges, wind-shelter boards for fields and kitchen gardens.
To create a hedge often use thuy, mountain ash, turn, boxwood, hawthorn, yew, forsythia, larch, juniper, barberry, cotoneaster, yellow acacia, rosehip.It is almost never used for landscaping cities and villages, although it looks very nice in group plantings consisting of a small group of trees.
Awl
Habitat Western and Eastern Siberia, down to the Angara River. It grows in the Altai, in the foothills of the Dzungarian Alatau. Distributed in the river valleys on pebbles, on the slopes of the mountains, on the rubble.
Plant height from 10 to 20 m, trunk thickness up to 1 m in diameter. This type of poplar is not high, skeletal branches are sprawling and few in number, and few new, young shoots grow on them in a year. Therefore, the crown of the plant is not thick, slightly sparse.
Did you know? In total, 95 species of poplar trees grow on planet Earth.Leatherette trunk gray with cracks. The tree is not very demanding for lighting and watering; it lives on poor soils. The roots of the laurel-leaved are very deep, it endures long Siberian winters rich in frost without problems.
The color of the bark of young shoots is light yellow, they are slightly pubescent. Shoots of an unusual type, and with clearly visible ribs, growing up, the shoots become rounded in diameter. 
This ribbing of the shoots is caused by longitudinal corky growths, which is the distinguishing feature of this particular poplar type. The kidneys are oval, sharp, brown-green, elongated, covered with a sticky and pleasantly smelling substance.
The foliage of the plant is large, leaf length is 6-14 cm, width is from 2 to 5 cm. The leaf shape is ovate-elongated, narrowed towards the end, the leaf has a finely cut border, it feels smooth, cool, leathery, with a two-tone color (green-whitish) to the touch . Blossoming foliage - sticky, light green.
Due to the frequent freezing of the branches, an abundant growth of young shoots occurs, from which the crown of the tree seems extremely lush and very decorative.
Flowering in this variety occurs in May-June, fringed earrings have a whitish color, fluffy fuzz, covered with yellow pollen.
The male form of cylindrical earrings is from 3 to 8 cm long, there are 20-25 stamens with staminate threads and anthers; the female form of flowering (earrings) has flowers rarely placed on them, the pistil with a two-bladed stigma of yellow color. The blades on the pistil are located down. 
After ripening (May-June), in the place of inflorescences-earrings, fruits form in the form of quadrangular swollen balls. Finally ripe seeds scatter from bursting testes. Poplar from a number of laurel apply in plantings along the roads.
Important! The poplar family is divided into male and female trees. But only female individuals during flowering spreads around the down.
Pyramidal
Poplar pyramidal - light-loving plant. Very high, the description of the species indicates a maximum height of 35-40 m and a maximum lifespan of up to 300 years. It grows in Italy, the Caucasus, in Ukraine, in Central Asia, in Russia.
Loves neutral and slightly acidic soils, moderately saturated with moisture, but well lit by the sun. Grows rapidly in the first 10 years. The cap of the plant is narrow, clearly elongated upwards, the branches are powerful, strong, growing at an angle of 90 ° with respect to the trunk. 
The diameter of the trunk on the cut can be up to one meter, has poorly defined annual rings, dark gray bark, cut by small cracks. It blooms with small flowers, collected in long inflorescences in the form of male and female earrings, female earrings are 5-7 cm longer than male ones.
Flowering occurs immediately after bud break. The color of women's and men's earrings are also different, men's - maroon, women's - light milky color.
The young plant has a smooth and supple, light gray or light olive bark. The leaf shape of a pyramidal poplar is clearly triangular, with a broad, even base, sharply tapering towards the top of the leaf.
As with other species of representatives of willows, the pyramid has shiny, dark green leaves with a white color on the bottom plate, fine-toothed along the edge. The leaves are attached to the branches with a short, sturdy stem, slightly flattened along.
With the onset of autumn, the foliage turns yellow; in mid-October, leaf cover crumbles to the foot of the trees. 
The roots of this plant are located deep down and in breadth, some of the roots are usually located on the ground near the base of the tree. It grows well in urban environments, there is no negative reaction to emissions of automotive gases into the air.
Black (hawk)
Black poplar or Osokor is widely spread in Russia and Ukraine, it grows in parks and squares, in deciduous forests. In landscaping the city is used because of its exceptional ability to provide oxygen.
Одно растение может выделить столько же кислорода, сколько 10 сосен и три больших, старых липы. За один летний сезон черный тополь очищает городской воздух от 20 кг пылевых накоплений, также его почки обладают целебными свойствами и применяются в народной медицине. 
За время жизни великан достигает 35-метровой высоты, срок его жизни от 60 до 300 лет. Old trees are sprawling, thick-haired, with a powerful trunk, swollen with skin growths, which eventually hardened and became shapeless wood species. Coarse bark, almost black.
Buds tightly pressed to the branches, rounded, large, in light scales, covered with gluten. The leaves are hard and large, triangular or diamond-shaped, attached to the branches with oblate cuttings.
Blossom - long earrings, burgundy and yellow, male and female species. Male and female blooms differ in color and length of inflorescences, female inflorescences are usually twice as long and more magnificent. 
Flowering occurs in late May or early June. At the end of the seed ripening begins dispersion (reproduction). The poplar family has earned recognition and love in different parts of the globe with its diversity, fast growth and unpretentiousness.
