Populus alba pyramidalis (Populus alba pyramidalis)
Description
It is a medium-sized-deciduous-tree, growing to heights of up to 16-27 metres (52-89-ft) (rarely more), with a trunk up to 2 metres (6.6-ft) in diameter and a broad rounded crown. The-bark-is smooth and greenish-white to greyish-white with characteristic diamond-shaped dark marks on young trees, becoming blackish and fissured at the base of old trees. The young shoots are covered with whitish-grey down, including the small buds. The-leaves-are 4-15-cm (1-1-2-6-in) long, five-lobed, with a thick covering of white scurfy down on both sides but thicker underneath; this layer wears off the upper side but not the lower, which stays white until autumn leaf fall. Larger, deeply lobed leaves are produced on fast-growing young trees, and smaller, less deeply lobed leaves on older, slow-growing trees. The-flowers-are-catkins-up to 8-cm (3-1-4-in) long, produced in early spring; they are-dioecious, with male and female catkins on separate trees; the male catkins are grey with conspicuous dark red stamens, the female catkins are greyish-green. The female catkins lengthen to 8-10-cm (3-1-4-4-in) after pollination, with several green seed capsules, maturing in late spring to early summer. It also propagates by means of-root suckers-growing from the lateral roots, often as far as 20-30-m (65-100-ft) from the trunk, to form extensive-clonal colonies
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum:
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Class: Magnoliopsida
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Order: Malpighiales
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Family: Salicaceae
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Genus: Populus
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