Norway maple seeds are flattened and its samara’s wings are widely spread (to 180 degrees) sugar maple seeds are globose, with wings diverging at 45 to 90 degrees. Norway maple leaves are usually broader than they are long, while sugar maple leaves are generally longer than wide (or with length=width). saccharum (sugar maple) in North America, but they can be distinguished in most characters. platanoides is sometimes confused with A.

It suffers less herbivory and fewer fungal diseases than sugar maple, which may give it a competitive advantage over sugar maple (Cincotta et al. The species is, however, still available at nurseries in other states and continues to be widely planted.Īdverse ecological effects include inhibition of understory growth (including tree saplings) due to its densely shading canopy and its release of allelopathic (defensive) chemicals, so it tends to create bare, muddy run-off conditions immediately under the tree (Galbraith-Kent and Handel 2008 Swearingen et al. states (USFS 2011) and eastern Canada it is banned from sale or planting in Massachusetts and New Hampshire. Norway maple is classified as invasive in 20 Northeastern U.S. 2008), and can become dominant in mesic (moist) soils where Acer saccharum (sugar maple) would otherwise grow. In the past 20–30 years, Norway maple has naturalized widely in North America, particularly in urban woodlots and forest edges (Barnes and Wager 2004, Cincotta et al. Maples were classified in their own family, Aceraceae, but are now generally included in Sapindaceae (Stevens 2001)-see Systematics. The fruit, produced in large amounts, is generally a pair of widely diverging samaras (hard nutlets with winged seeds) clusters of three samaras sometimes occur. The flower clusters, which appear in early spring before leaves have emerged, are larger and more conspicuous than in many North American maples. The yellow to yellow-green flowers, with 5 petals and 5 petal-like sepals, are each 3–4 mm long and occur in corymbs of 15–30 together. The tree grows 20–30 m tall with a trunk up to 1.5 m diameter.

The leaves are opposite and palmately lobed with five coarsely toothed lobes petioles are 8–20 cm long. Its many cultivars are widely planted in North America as a lawn, park, and street tree because they are hardy and cold resistant, tolerate pollution, soil compaction, and other urban conditions, and are relatively free of insect pests and diseases.

Sawadaea tulasnei parasitises Acer platanoidesĪcer platanoides, Norway maple, is a medium to large deciduous tree native to northern and central Europe and western Asia (Barnes and Wagner 2004). Licea parasitica grows on live bark of Acer platanoidesĪmphigenous colony of Mycocentrospora anamorph of Mycocentrospora acerina causes spots on live leaf of Acer platanoidesĮpiphyllous, covered, then open acervulus of Phloeospora coelomycetous anamorph of Phloeospora platanoidis causes spots on live leaf of young plant of Acer platanoides Licea margaritacea grows on live bark of Acer platanoides Licea kleistobolus grows on live bark of Acer platanoides Subcortical colony of Cryptostroma dematiaceous anamorph of Cryptostroma corticale infects and damages subcortex of standing tree of Acer platanoidesĬortical, bursting through, multilocular, dark-brown stroma of Cytosporina coelomycetous anamorph of Cytosporina notha is saprobic on dead, dry bark of Acer platanoides Hypophyllous, immersed, densely clustered into groups pycnidium of Asteromella coelomycetous anamorph of Asteromella platanoidis parasitises fading leaf of seedling of Acer platanoidesĬolony of Cristulariella anamorph of Cristulariella depraedans causes spots on live, green leaf of Acer platanoidesįruitbody of Crustomyces expallens is saprobic on hard, barely decayed, corticate log (large) of Acer platanoides

Norway maple acer platanoides