Populus tremula – Aspen

General Information Common Name  Aspen Scientific Name  Populus tremula Sun Tolerance  Full Sun Height  10-20 m (33 - 66 ft) Spread  6 -12 m (20 - 40 ft) Growth Rate  Fast Bloom Time  Early Spring Color  Green Flower Color  Yellow Type  Tree Native  Europe, USA

Classification Kingdom  Plantae – Plants Subkingdom  Tracheobionta – Vascular plants Superdivision Spermatophyta – Seed plants Division  Magnoliophyta – Flowering plants Class  Magnoliopsida – Dicotyledons Subclass  Dilleniidae Order/  Salicales Family  Salicaceae – Willow family Genus  Populus L. – cottonwood Species  P. tremula

Populus tremula – Aspen

Populus tremula common name is Aspen also called European Aspen. This is a moderate sized poplar, erect with a lender crown and trunk, is perhaps best known from its roundest leaves which almost ceaselessly quiver and rustle even on calm days. It is very hardy and tolerates well places, unfortunately perhaps, it is often surrounded with numerous suckers which may even form a thicket.

The adult leaves, produced on branches of mature trees, are nearly round, slightly wider than long, 2–8 cm diameter, with a coarsely toothed margin and a laterally flattened petiole 4–8 cm long. The young green shoots soon become smooth and golden brown, and then darken. The branch-less are smooth and shiny with winter buds that are shiny reddish-brown and sometimes somewhat sticky. The roundish leaves, on a long thin much flattened leaf-stalk, are dull, rich green on top, paler yellow underneath, three prominent veins radiate from the base, and the outer rim has indented edges and is sometimes tinged with red. The quivering leaves persist on the tree late into the autumn, turning a rich yellow before they fall.

The male catkins, which open late in February, are woolly on account of the deeply cut and hairy scales, they have purple stamens, later contrasting with the yellow pollen. The seed capsules burst in the latter part of May, but seed rarely germinates well. Propagation is best by root cuttings.

At first the bark is pale greenish-grey and smooth, becoming dark grey and rugged with age. The white wood is light and soft, and is excellent for match sticks and match boxes. Other uses include ‘chip’ baskets, paper pulp and wood wool. The tree seldom reaches a suitable timber size in Europe, so attempts to cultivate it are rare.

Populus tremula – Aspen

European Aspen : Leaves

European Aspen : Leaves

European Aspen : Leaves

European Aspen : Flowers

European Aspen : Flowers

European Aspen : Flowers

European Aspen : Bark

European Aspen : Trunk

European Aspen : Log

European Aspen : in Autumn

European Aspen in Autumn

European Aspen in Autumn

European Aspen

European Aspen

Populus Nigra - Lombardy Poplar

General Information Common Name  Lombardy Poplar Scientific Name  Populus nigra Sun Tolerance  Full Sun Height  40-50 m (130-150 ft) Spread  6 -12 m (20 - 40 ft) Growth Rate  Fast Bloom Time  Late Spring Color  Green Flower Color  Yellow Type  Tree Native  Europe, USA

Classification Kingdom  Plantae – Plants Subkingdom  Tracheobionta – Vascular plants Superdivision Spermatophyta – Seed plants Division  Magnoliophyta – Flowering plants Class  Magnoliopsida – Dicotyledons Subclass  Dilleniidae Order/  Salicales Family  Salicaceae – Willow family Genus  Populus L. – cottonwood Species  P. nigra

Populus Nigra - Lombardy Poplar

Populus Nigra subspecies 'Italica' common name is Lombardy Poplar. This is well known poplar in Europe. It is a narrow erect tall tree with a graceful plume-like fastigiated outline which adds dignity to the landscape.
Sub-species of Populus nigra:
* Populus nigra sub-species: nigra. Central and eastern Europe. Leaves and shoots glabrous (hairless); bark grey-brown, thick and furrowed.
* Populus nigra sub-species: betulifolia (Pursh) W.Wettst. North-west Europe (France, Great Britain, Ireland). Leaf veins and shoots finely downy; bark grey-brown, thick and furrowed, often with heavy burrs, trunk usually heavily leaning.
* Populus nigra sub-species: caudina (Ten.) Bugała. Mediterranean region, also southwest Asia if var. afghanica not distinguished.
* Populus nigra var. sub-species: afghanica Aitch. & Hemsl. (syn. P. nigra var. thevestina (Dode) Bean). Southwest Asia; treated as a cultivar of P. nigra by many botanists and as a distinct species P. afghanica by others bark smooth, nearly white; leaves and shoots as subsp. caudina.
* 'Italica'. The true Lombardy poplar, selected in Lombardy, northern Italy, in the 17th century. The growth is fastigiate, with a very narrow crown. Coming from the Mediterranean region, it is adapted to hot, dry summers and grows poorly in humid conditions, being short-lived due to fungal diseases. It is a male clone.

The green shoots become pale yellow, then grayish or brown. The reddish-brown winter buds are oval and pointed. The leaves are triangular in shape, though the basal angles are rounded, not sharp. This is a deciduous tree.

The short pendent male catkins have red anthers. They shed pollen in late March or early April. Female catkins are longer, green and curved.

The bark soon becomes rugged, and is almost black at the base, smooth and grey or brown on the upper part. The branches are all more or less erect. The tree normally never suckers, but when cut down suckers arise over practically the whole extent covered by its root system. It is useless for timber particularly on account of its numerous knots. 

The main purpose of planting the tree is to provide a screen, or a barrier against wind, dust and noise. It is easily struck from cuttings.

Populus Nigra - Lombardy Poplar

Populus Nigra - Lombardy Poplar

Populus Nigra - Lombardy Poplar Bark

 Lombardy Poplar Woods

Populus Nigra - Lombardy Poplar Leaves

Populus Nigra - Lombardy Poplar Beauty

Populus Nigra - Lombardy Poplar

Populus nigra - Black Poplar

General Information Common Name  Black Poplar Scientific Name  Populus nigra Sun Tolerance  Full Sun Height  16-27 m (50 - 90 ft) Spread  6 -12 m (20 - 40 ft) Growth Rate  Fast Bloom Time  Late Spring Color  Green Flower Color  Yellow Type  Tree Native  Europe, USA

Classification Kingdom  Plantae – Plants Subkingdom  Tracheobionta – Vascular plants Superdivision Spermatophyta – Seed plants Division  Magnoliophyta – Flowering plants Class  Magnoliopsida – Dicotyledons Subclass  Dilleniidae Order/  Salicales Family  Salicaceae – Willow family Genus  Populus L. – cottonwood Species  P. nigra

Populus nigra - Black Poplar

Populus nigra common name is Black Poplar. This is poplar is native to Europe, though it is not common, and its epithet ‘black’ may have arisen only from contrast with the White Poplar and the Grey Poplar. It is a large heavily limbed tree, sparsely branched, with some of the main branches descending in arches. On it short massive trunk it often carries conspicuous large burrs.

Sub-species of Populus nigra:
* Populus nigra sub-species: nigra. Central and eastern Europe. Leaves and shoots glabrous (hairless); bark grey-brown, thick and furrowed.
* Populus nigra sub-species: betulifolia (Pursh) W.Wettst. North-west Europe (France, Great Britain, Ireland). Leaf veins and shoots finely downy; bark grey-brown, thick and furrowed, often with heavy burrs, trunk usually heavily leaning.
* Populus nigra sub-species: caudina (Ten.) Bugała. Mediterranean region, also southwest Asia if var. afghanica not distinguished.
* Populus nigra var. sub-species: afghanica Aitch. & Hemsl. (syn. P. nigra var. thevestina (Dode) Bean). Southwest Asia; treated as a cultivar of P. nigra by many botanists and as a distinct species P. afghanica by others bark smooth, nearly white; leaves and shoots as subsp. caudina.
* 'Italica'. The true Lombardy poplar, selected in Lombardy, northern Italy, in the 17th century. The growth is fastigiate, with a very narrow crown. Coming from the Mediterranean region, it is adapted to hot, dry summers and grows poorly in humid conditions, being short-lived due to fungal diseases. It is a male clone.

The green shoots soon become yellow-ochre colored, thereafter turning grey, and finally darkening. The oval winter buds are reddish and pointed and are set at uneven intervals on all sides of the twigs. The leaves are triangular to rhombic in shape, though the basal angles are rounded, not sharp. They open as khaki or light brown, but are soon deep green on top, paler under neath, with a translucent margin which bears shallow teeth. The long stalks are flattened close to the leaf-blade. The leaves turn yellow in autumn.

The attractive male catkins expand and hang like lambs’ tails in March before the leaves unfold, the anthers are crimson until they show their pale yellow pollen. The female catkins, never on the same tree as the male, are longer, with stout greenish-white stigmas. They fall in early June as numerous small down-clad capsules but they seldon contain seed. The tree is propagated by cuttings. It rarely produces suckers.

The bark is almost black, deeply and irregularly furrowed into broad, thick ridges. The wood is almost white in color, soft and light, very open in texture but with woolly fibers. It is used for packing cases, and general purposes.

Black Poplar has now been replaced for commercial planting by its quicker-growing hybrid clones, such as Populus ‘Serotina’. These are established on fertile, well-watered lowland soils to yield timber for match sticks, match boxes and baskets.

Populus nigra - Black Poplar

Black Poplar Leaves

Populus nigra - Black Poplar : Huge Bark

Populus nigra - Black Poplar Bark

Populus nigra - Black Poplar in Autmn

Populus nigra - Black Poplar

Populus nigra - Black Poplar

Populus alba – White Poplar – Abele

General Information Common Name  White Poplar, Abele Scientific Name  Populus alba Sun Tolerance  Full Sun Height  16-27 m (50 - 90 ft) Spread  6 -12 m (20 - 40 ft) Growth Rate  Fast Bloom Time  Late Spring Color  Green Flower Color  Yellow Type  Tree Native  Europe

Classification Kingdom  Plantae – Plants Subkingdom  Tracheobionta – Vascular plants Superdivision Spermatophyta – Seed plants Division  Magnoliophyta – Flowering plants Class  Magnoliopsida – Dicotyledons Subclass  Dilleniidae Order/  Salicales Family  Salicaceae – Willow family Genus  Populus L. – cottonwood Species  P. alba

Populus alba Full Tree

Populus alba common name is White Poplar also known as Abele. It is an attractive ornamental Poplar tree, handsome by reason of its pale bark and the glistening undersides of its quivering leaves. It was introduced in about 1548, and an old English name is ‘Abele’, evolved from the Latin alba, white. The young round shoots are at first white from their dense covering of matted, woolly down. The winter buds are covered like-wise. 

The leaves on the short shoots are small and variable in shape, the margins being dentate or shallowly lobed and having a few blunt, more or less triangular teeth. Most of these early leaves are as broad as, or even broader than, their length, and the upper surface is deep green, and somewhat hairy, the lower surface is at first white from the thick down, but soon becomes grey. The even more downy leaves on the long summer shoots and suckers are larger, up to 4 inches across, and palmately lobed, with the lobes bearing a few bluntly triangular teeth. The leaf-stalks on all the leaves are round or slightly flattened, and downy. 

The male pendent catkins, which open in early May, are some 2 or 3 inches long and have crimson anthers, the female catkins are rather shorter. Male and female trees are rarely found together, so fertile seed is seldom produced. Cuttings and suckers are the best means of propagation.

The attractive smooth and greyish-white bark has a greenish tinge and only slowly becomes black and roughened at the base. The tree is of no economic value but many people appreciate its decorative attractions, particularly its silvery appearance in spring and the contrast of the white and golden leaves in autumn. It is a good seaside tree. White Poplar is much confused with the possibly native Grey Poplar, P. canescens Sm., which grows faster, has a better shape, and reaches a larger size.

White Poplar Leaves

Populus alba Leaves Both Sides

Populus alba Flower With Cotton

White Poplar's White Cotton

Populus alba Bark

White Poplar Bark

Populus alba Bark

Populus alba Bark

Populus alba Full Trunk

White Poplar's Seeds whit Cotton

Populus alba Full Tree

White Poplar Full Tree