Red Maple
Arbor Walk #9, TreeKeeper ID #1875
This is a large, native, shade tree and its reddish fall color is one of its most dramatic features. The flowers, seeds, and twigs on the Red Maple also have red color spread throughout. Although known for its iconic leaves, the samaras of the Red Maple provide food for many animals as well. Its leaves are particularly resistant to leaf chlorosis. The Red Maple grows in the Eastern and Central portion of the United States and is the state tree of Rhode Island.
More information on the Red Maples in our Arboretum here!
| Common Name | Red Maple |
|---|---|
| Latin Name | Acer rubrum |
| Indigenous Name(s) | |
| Cultivar/Variety | |
| Commercial Name |
Global Distribution
GPS Coordinates
N/A
Percent Concrete
N/A
Distance to Buildings
| Year | Close Building #1 | Close Building #2 | Close Building #3 |
|---|---|---|---|
| 2020 | Olin Library, 32.62 m | Women’s Building, 48.54 m | Graham Chapel, 55.48 m |
Distance to Other Species
| Year | Close Species #1 | Close Species # 2 | Close Species # 3 |
|---|---|---|---|
| 2020 | Tulip Tree, 9.42 m | Tulip Tree, 12.28 m | Tulip Tree, 14.92 m |
Standard Measurements
| Year | Height (m) | DBH (cm) | Caliper (m) | Crown Diameter N-S (m) | Crown Diameter E-W (m) | Average Crown Diameter (m) |
|---|---|---|---|---|---|---|
| 2020 | 13.4586 | 38.6 | N/A | 12.54 | 13.35 | 12.945 |
| 2023 | 17 | 47 | N/A | 13.7 | 15.9 | 14.8 |
| 2024 | 17.78 | 43.4 | 15.02 | 15.02 | 14.23 | 14.625 |
Nests and Pests
| Year | Description |
|---|---|
| 2020 | 1 bundle of dead pedicels wrapped in silk 1 old wound appeared reddish and swollen Green and grey lichen Dark algae/mildew in the ridges in trunk bark Old wound with a deep, dark hole in the center (entry point for fungus/insects) |
Leaf Identification
The Red Maple has simple, 3- to 5-lobed leaves arranged opposite from each other on the stem. The sinuses between lobes are comparatively shallow among maples, but this can vary. The leaves are shallowly serrated. The leaf base may range from rounded to indented.
Twig and Bud Identification
The twig is dark brown and smooth, with pale lenticels (pores). The twig lightens in color as it ages, developing ringed notches. The terminal buds are paired and have multiple scales.
Bark Identification
The bark is variable colors of gray, generally smooth but developing small scales with age.
Fruit Identification
The Red Maple fruit is a double samara (papery winged seed coat), which mature from red-pink to red-brown. They fall from the tree in late spring to early summer.
Flower Identification
The flowers of the Red Maple are small, bright red, and located in small clusters close to the branch. The petals may not always be particularly prominent. The Red Maple can be monoecious, dioecious, or even bisexual, so not all flowering systems may be the same between individual trees.
‘Frank Jr.’ Identification
The ‘Frank Jr.’ cultivar has a pyramidal shape and grows slightly smaller than wild Red Maples, reaching only 50′ at the highest.
