![]() Given the opportunity, cultivars will near-universally cross with their native counterparts, which brings a risk of contamination to local genetic stock that can be a challenge to identify. Cultivars Ĭultivars are plants sourced and/or bred for specific characteristics that are deemed to be attractive and/or commercializable to the mainstream public. In the wetter parts of its range, such as in the Olympic National Park and lowland forest around Puget Sound, the bark is often covered with epiphytes such as club moss and licorice fern. īigleaf maple is preferred as habitat by the barred owl, an invasive species to coast range habitat, and the presence of the tree is positively associated with Hammond's flycatchers. Ī western Oregon study found that 60% of bigleaf maple seedlings over 25 cm (10 in) tall had been browsed by deer, most several times. The foliage is browsed by ungulates such as black-tailed deer, mule deer, elk, and horses, as well as by mountain beavers and other rodents. Deer mice have been observed consuming bigleaf maple seeds in the spring in the Sierra Nevada. The winged fruits are eaten by squirrels, and by grosbeaks in the winter. It spreads and grows vegetatively from cuttings and stumps of any size in a prolific manner. ![]() Along with red alder, bigleaf maple often dominates early postfire succession in Douglas-fir forests, and fire can increase its forest presence. It is not considered to be fire-resistant due to its thin bark, but large trees with thick bark may survive moderate fires. It is fairly shade tolerant, but not as much so as vine maple, and benefits from disturbances. The tree can live in a wide range of habitats, but thrives in fairly well-hydrated hardwood forests, occurring with red alder, black cottonwood, and willows. It is very rare north of Vancouver Island though cultivated in Prince Rupert, near Ketchikan, and in Juneau. It can form pure stands on moist soils in proximity to streams, but is generally found within riparian hardwood forests or dispersed, (under or within), relatively open canopies of conifers, mixed evergreens, or oaks ( Quercus spp.) In cool and moist temperate mixed woods they are one of the dominant species. It usually grows from sea level to elevations of 450 m (1,480 ft), and more exceptionally 1,200 m (3,900 ft). Distribution and habitat īigleaf maple can be found west of British Columbia's Coast Ranges and the Cascade Range, from Vancouver Island to California. The fallen leaves, blossoms, and seeds are concentrated with potassium, calcium, and other nutrients. Both were in the adjoining grassy area which was originally the cemetery of All Hallows and is now the Front Square of TCD. The second, also infected, was cut down as the same fate was expected. ![]() The first had an interior which was beginning to rot, and it fell after inclement windy weather. In May 2018 the oldest two Oregon maples in Europe, 175 years old, were removed from Trinity College Dublin (TCD), Ireland. ![]() Bigleaf maple begins bearing seed at about ten years of age. The fruit is a paired winged samara, each seed 1–1.5 cm ( 3⁄ 8– 5⁄ 8 in) in diameter with a 4–5 cm ( 1 + 5⁄ 8–2 in) wing. The flowers appear in early spring, before the leaves. It is hermaphroditic, bearing both male and female flowers in each raceme. In spring, the tree produces flowers in pendulous racemes 10–15 cm (4–6 in) long, greenish-yellow with inconspicuous petals. In autumn, the leaves turn gold and yellow, contrasting against backdrops of evergreen conifers. The stems are 15–30 cm (6–12 in) long and contain milky sap. The bigleaf maple has the largest leaves of any maple, typically 15–30 centimetres (6–12 inches) across with five deeply incised palmate lobes, with the largest running to 61 cm (24 in). The bark is gray brown, darkening and developing ridges with age. The previous national champion is located in Marion, Oregon, and is 27 m (88 ft) tall with a crown spread of 32 m (104 ft), with an average dbh of about 2.5 m (8 ft). It is 36 m (119 ft) tall with a crown spread of 28 m (91 ft), with an average diameter at breast height (dbh) of about 3.7 m (12 ft). The species' current national champion for size is located in Lane County, Oregon. Large Acer macrophyllum leaf in Washington State Description īigleaf maple can grow up to 48 metres (158 feet) tall, but more commonly reaches 15–20 m (50–65 ft) tall and 90–120 cm (35–47 in). Some stands are also found inland in the foothills of the Sierra Nevada of central California, and a tiny population occurs in central Idaho. It is native to western North America, mostly near the Pacific coast, from southernmost Alaska to southern California. 1784Īcer macrophyllum, the bigleaf maple or Oregon maple, is a large deciduous tree in the genus Acer. Acer flabellatum Greene 1912 not Rehder 1905.
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