Though very rare north of Vancouver Island, it is 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). Some stands are also found inland in the foothills of the Sierra Nevada of central California, and a tiny population occurs in central Idaho. Distribution and habitat īigleaf maple mostly occurs near North America's Pacific coast, west of British Columbia's Coast Ranges and the Cascade Range, from southernmost Alaska to southern 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 cm (6–12 in) 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 centimetres (35–47 inches). In addition to uses by animals, it is of some culinary and woodworking interest. 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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