page_title: Acer rubrum
section_title: Allergenic potential
hierarchical_section_title: Acer rubrum / Ecology / Allergenic potential
caption_attribution_description: English: Male Red Maple flowers on Bayberry Road in Ewing, New Jersey
context_page_description: Acer rubrum, the red maple, also known as swamp, water or soft maple, is one of the most common and widespread deciduous trees of eastern and central North America. The U.S. Forest service recognizes it as the most abundant native tree in eastern North America. The red maple ranges from southeastern Manitoba around the Lake of the Woods on the border with Ontario and Minnesota, east to Newfoundland, south to Florida, and southwest to eastern Texas. Many of its features, especially its leaves, are quite variable in form. At maturity, it often attains a height of around 30 m. Its flowers, petioles, twigs and seeds are all red to varying degrees. Among these features, however, it is best known for its brilliant deep scarlet foliage in autumn.
  Over most of its range, red maple is adaptable to a very wide range of site conditions, perhaps more so than any other tree in eastern North America. It can be found growing in swamps, on poor dry soils, and almost anywhere in between. It grows well from sea level to about 900 m. Due to its attractive fall foliage and pleasing form, it is often used as a shade tree for landscapes.
context_section_description: The allergenic potential of red maples varies widely based on the cultivar.
  The following cultivars are completely male and are highly allergenic, with an OPALS allergy scale rating of 8 or higher:
  'Autumn Flame' ('Flame')
  'Autumn Spire'
  'Columnare' ('Pyramidale')
  'Firedance' ('Landsburg')
  'Karpick'
  'Northwood'
  'October Brilliance'
  'Sun Valley'
  'Tiliford'
  The following cultivars have an OPALS allergy scale rating of 3 or lower; they are completely female trees, and have low potential for causing allergies:
  'Autumn Glory'
  'Bowhall'
  'Davey Red'
  'Doric'
  'Embers'
  'Festival'
  'October Glory'
  'Red Skin'
  'Red Sunset' ('Franksred')
caption: Male flowers
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