- BOTANICAL NAME: Acer rubrum
- PRONUNCIATION: A-ser RU-brum
- COMMON NAME: Red or Swamp Maple
- FAMILY: Aceraceae
- NATIVITY: Southeastern Canada and southern US; common in Southeastern PA.
- GROWTH HABIT: Pyramidal in youth, developing ascending branches and an irregularly rounded crown with age; 40'-60' (100') tall. Medium to fast growth rate.
- HARDINESS: USDA Zones 3 - 9.
- OPTIMUM GROWING CONDITIONS: Full sun to light shade in moist, acid soil. Tolerates poor drainage and many types of soil. Very adaptable plant.
- SUCCESSIONAL STATUS: Successional
- FACULTATIVE STATUS: Facultative wetland
- LANDSCAPE VALUE: Excellent specimen tree. Select cultivars for best fall color.
Easily transplanted and adaptable to variations in soil moisture.
- FOLIAGE: Opposite, simple 2"-4" long; 3-5 lobes, lobes are irregularly toothed.
New growth and petiole reddish. Leaves are often a lighter color on lower surface than top. Fall color variable.
- BUDS: Small, red, clustered; 1/16" - 1/8" long. Flower buds and subsequent flowers are quite attractive.
- BARK: Silver-gray, smooth in youth. No fetid odor when crushed. (see A. saccharinum).
- FRUIT: Red to green in color, 2" long or less with wings spreading at about 60 degrees.
Fruit maturing in the spring.
- PROPAGATION: Seed, cuttings; some graft incompatibility.
- PESTS: Leaf Hopper
- `Armstrong' - Fastigiate form. Fall color may be poor.
- `Autumn Flame' - Good early red fall color.
- `Columnare' - Narrow columnar or Pyramidal form. Good fall color.
- `October Glory' - Bright-orange to red fall color in late fall.
- `Red Sunset' - Orange to red fall color before `October Glory.'