![]() Like Norway maple, flowers are yellowish-green, but they tend to appear in late April to May, and each hanging flower cluster or corymb is 6-12cm long. Opposing buds are green, and the flowers appear at the same time as the foliage. ![]() Sycamore has large leaves with five coarsely-toothed lobes.Fruits are paired and the wings spread on the horizontal or at a wide angle Flowers appear in April before the leaves, and the yellowish-green flowers grow in erect clusters. The opposing buds (characteristic to all acers) are deep red. Norway maple has large leaves with five to seven lobes with few sharp teeth and pointed tips.Other ways to distinguish between the two species (depending on the time of year) include comparing buds, flowers, leaves and samaras. Unlike sycamore, Norway maple exudes a milky sap when the leaf stalks are broken. Sycamores can reach 35m in height, taller than Norway maples, but their autumn colour is less spectacular. Repeat when necessary to control re-growth from sprouts.Acer platanoides can be confused with sycamore ( Acer pseudoplatanus), another naturalised European species introduced into Britain centuries ago, and widely planted from the 1700s. Seedlings can be pulled by hand and small to large trees can be cut to the ground. Norway maple samaras resemble a coat hanger sugar maple samaras resemble horseshoes. Often portions revert back to the usual 'green-leaf' form, remove reverted branches as they appear to maintain variegated habit. Hardy to USDA Zone 4 Introduced in about 1903 by Messrs. Leaves have a bright green center with wide white edging. Norway maple leaves have deeper sinuses between the lobes than those found on sugar maples. Deciduous tree, 30-40 ft (9-12 m), similar spread. The fruits are also similar in appearance the paired “samaras” have widely-spaced wings that spin and flutter in the wind when falling from the tree. Additionally, their leaf shape and branching pattern are very similar to native sugar and red maples. How can I identify it?īecause Norway maples are so widespread throughout the northeastern US, they are often overlooked as a native species. When seeds land in garden beds or other open areas, they germinate readily in the following spring. It produces large numbers of seeds that are dispersed by the wind. It grows more quickly than the native sugar maple, and apparently reproduces more quickly as well. Norway maple flowers early in the spring, before many native North American trees and shrubs, which may favor its ability to spread. Seventeen states, including Maryland, Virginia, West Virginia and Delaware, classify it as and invasive plant species. These characteristics have led New Hampshire and Massachusetts to ban Norway maples. It has a shallow root system, and its dense canopy suppresses growth of grasses and seedlings beneath it. It also tolerates compacted soils and urban environments. It tolerates a wide range of light conditions (from full sun to part shade) and soil types (growing in clays, loams, and sandy soils, tolerating both acidic and alkaline conditions). The Norway maple is a fast-growing deciduous tree that commonly grows to 40-50 feet in height, but may grow as tall as 100 feet. It has spread as reforestation occurred across the Northeast, and has also escaped from town plantings. It was also a popular choice in the mid-twentieth century to replace dying American Elm trees in cities and towns.įrom there, it has spread throughout the northeastern US, from Maine to Wisconsin, south to Tennessee and Virginia, and to the Pacific Northwest. It was planted on farms and in towns and became a popular choice for its hardiness, adaptability to harsh conditions, and its lush canopy and generous shade. It was first introduced to North America in 1756, when John Bartram of Philadelphia imported trees for sale as ornamental landscaping plants. Its natural range stretches from western France in the east to central Russia in the west, and from southern Scandinavia to northern Turkey. The Norway maple ( Acer platanoides) is native to Europe. The Norway maple is so conspicuous throughout the United States that it is often easy to forget that it is an introduced species that can adversely affect the environment.
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