Discovered by Leon Snyder in northern Minnesota and introduced by the Minnesota Landscape Arboretum in 1980. Hardy to USDA Zone 3, maybe the hardiest of the Red Maples. Northwood® - broadly oval to rounded, open, 40 × 35 ft (12 × 11 m), male, foliage medium to dark green, reddish fall color. Karpick (1902-1990) a city forester of Buffalo, NY. Introduced in 1992 by the Schichtel nursery of Orchard Park, New York and named for Frank E. Karpick® - narrow oval shape, 40 × 20 ft (12 × 6 m), male, foliage yellow to orange in fall. Hardy to USDA Zone 4 Selected by the Scanlon nursery of Ohio in 1946 and named in 1951, the original tree was near Cleveland and named after the road on which it was discovered (Jacobson, 1996). ‘Bowhall’ - very narrow, upright, 40 × 15 ft (12 × 4.5 m), female, foliage medium green, yellow-orange to reddish-orange fall color.Only male flowers are observed in spring, hence no seeds are formed (i.e., seedless). ‘Autumn Spire’ - shows early fall color which progresses from deep-purple red to bright red.McGill & Sons nursery, Fairview, Oregon (PP 2377).Īutumn Radiance® - oval to rounded, to 40 ft (12 m), orange-red to red fall color, colors early, as much as 2 weeks before Red Sunset® (Jacobson, 1996) Hardy to USDA Zone 3b Introduced in about 1964 by A. Many selections available, some of the more common ones include:Īutumn Flame® - dense rounded spreading branches, 35 × 35 ft (10 × 10 m), male, medium green foliage, bright red fall color, one of the earliest to color. Part of its range overlaps with that of Acer saccharinum, Silver Maple, with which it hybridizes, intermediate forms often occur. Hardy to USDA Zone 4 (some selections Zone 3) Large native range, from Newfoundland to Florida west to Minnesota, Oklahoma, Texas. It may not be particularly urban tolerant and has a tendency to produce surface roots. Sun, very tolerant of soils, but prefers slightly acid and moist conditions (occurs naturally in low, wet areas, hence one of its common names, Swamp Maple). In winter, tree shows long shoots with many short shoots. Fruit, a samara, wings 12-15 mm long, about a 60° between them, shed by early summer. Flowers red (source of "red maple" name), small petals and sepals, appear before leaves, one of the first maples to bloom in spring or late winter, male (pollen) flowers and female (seed) flowers often on different branches of the same tree, young trees may have only one type of flowers. (Compare to other common landscape maples.) Fall leaf color may vary from green-yellow, yellow, to brilliant red, one of the first trees to color. Leaves opposite, simple, 5-10(13) cm long and wide, usually with 3 serrated lobes, but sometimes 5, base rounded or subcordate, medium to dark green above, silvery below and usually pubescent on veins. Bark is smooth, light gray on young trees, developing to dark gray, rough, and furrowed on older trees. Broadleaf deciduous tree, 60-75(100) ft, develops ascending branches, irregular, ovoid or rounded crown.
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