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When applied to Britain and Ireland, three possible definitions of this time constraint are: a species that colonised these islands during the retreat of ice at the end of the last ice age a species that was present in these islands when the English Channel was created and the land bridge between Britain and continental Europe was flooded
Acer is a genus of trees and shrubs commonly known as maples. The genus is placed in the soapberry family Sapindaceae . [ 1 ] [ 2 ] There are approximately 132 species , most of which are native to Asia , [ 3 ] with a number also appearing in Europe , northern Africa , and North America .
The trunk diameter often ranges from 46 to 88 cm (18 to 35 in); depending on the growing conditions, however, open-grown trees can attain diameters of up to 153 cm (60 in). The trunk remains free of branches until some distance up the tree on forest grown trees, while individuals grown in the open are shorter and thicker with a more rounded crown.
Acer palmatum is deciduous, with the growth habit of a shrub or small tree reaching heights of 6 to 10 m (20 to 33 ft), rarely 16 m (52 ft), reaching a mature width of 4.5 to 10 m (15 to 33 ft), [8] often growing as an understory plant in shady woodlands. It may have multiple trunks joining close to the ground.
Acer platanoides is a deciduous tree, growing to 20–30 m (65–100 ft) tall with a trunk up to 1.5 m (5 ft) in diameter, and a broad, rounded crown. The bark is grey-brown and shallowly grooved. Unlike many other maples, mature trees do not tend to develop a shaggy bark.
Acer × bormuelleri Borbas (A. monspessulanum × A. campestre or A. opalus) Acer × boscii Spach (A. monspessulanum × A. tataricum or A. pensylvanicum × A. tataricum, possibly A. tataricum × A. campestre) Acer × conspicuum van Gelderen & Otterdoom (A. davidii × A. pensylvanicum) Acer × coriaceum Bosc ex Tausch (A. monspessulanum × A ...
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Acer japonicum is a small deciduous tree growing to 5–10 m (rarely 15 m) tall, with a trunk up to 40 cm in diameter. The bark is smooth on young trees, becoming rough and scaly on old trees. The shoots are slender, and thinly downy with whitish hairs.