Details of...
Scientific Name: Acer rubrum
Pronunciation: AY-sur ROO-brum
Common Name: red maple
Family Name: Sapindaceae
Plant Type: Tree - deciduous
Key ID Features: Leaves with 3 major lobes with soft serrations, fall colour vibrant red; terminal buds multiple; samaras red, narrower angle compared to A. platanoides. Winter ID: buds small (3 mm) red opposite; flower buds in large clusters circle twigs, give branches a bumpy look.
Course(s): AARB 1012, HORT 1155, Level 2 Apprenticeship, CLT Training

Habit: Open
Form: Columnar, Oval - vertical, Pyramidal - narrowly, Round
Texture: Medium - coarse
Mature Size:
Height:15 - 22m
Spread:10 - 15m
Growth Rate:Moderate
Origin: Canada - eastern, U.S. - northeast
Hardiness Rating: Zone 3: (-40 to -34 C)
Exposure: Full sun
Soil/ Growing Medium: Acidic
Water Use: Moderate
Landscape Uses: Fall interest, Specimen plant
Additional Info: Google. Cultivars shown or on campus may include A. Armstrong (columnar), A. 'Bowhall' (columnar), and A. 'Red Sunset' (see separate entries).
red maple
Leaf Morphology: Glossary
Form: Lobed, Simple
Arrangement: Opposite
Texture/ Venation: Soft flexible
Surfaces: Glabrous
Colour in Fall: Red
Leaf(let) Terms:
Shapes: Ovate
Apices: Acuminate
Bases: Cordate
Margins: Ciliate, Double serrate, Palmately lobed
Additional Info: Spectacular fall colour, Images are of A. ‘Bowhall’ and A. ‘Red Sunset’.

Inflorescence Type: Corymb
Flower Morphology:Monoecious plant
Number of Petals:5
Corolla Shape:Funnelform
Ovary Position:Superior
Colour (petals): Not showy, Red
Flower Scent: None
Flower Time at Peak: Feb, Mar

Fruit Type: Samara, Schizocarp
Fruit Colour: Red, Brown
Fruiting Time: Jun, Jul

Bark Morphology: Smooth, Moderately fissured
Bark or Stem Colour: Grey, Dark Grey
Additional Info:Image is of A. ‘Bowhall'
Leaf Bud Type: Ovoid
Leaf Scar Shape:U-shaped

Propagation: Seed, Softwood cuttings, Grafting
Pest Susceptibility: Heteroptera - true bugs, Mites, Stem borer insects, Wilt, ( Drought resistant )
Specific Pests: Leaf hoppers, eriophyid mite galls., Verticillium wilt.
(BCE) Boulevard (Circular) Eastend : cv. Red Sunset
(BCW) Boulevard (Circular) Westend : cv. Bowhall
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