Manitoba maple

Silhouette - Manitoba maple
  • Latin name: Acer negundo L.
  • French name: Érable à Giguère
  • Synonym(s): Box-elder , ahsleaf maple
  • Taxonomic Serial Number: 28749
  • NA2 , C2
Description

Leaves

  • Preformed leaf - Manitoba maple
  • Neoformed leaves - Manitoba maple
  • Neoformed leaves - Manitoba maple

Form

  • Pinnately compound
  • Leaflets often asymmetrical
  • Neoformed leaves with 3–9 leaflets on central stock
  • Preformed leaves only have 3 leaflets
  • Hairless

Length

  • 5–12 cm

Colour

  • Upper surface light green
  • Lower surface greyish-green

Autumn colour

  • Yellow

Margin

  • Irregular, especially on neoformed leaves
  • Leaflets shallowly and irregularly coarsely toothed or lobed

Buds

  • Lateral bud and leaf scar - Manitoba maple

Form

  • Terminal bud present, ovoid, blunt
  • 2 or 3 pairs of scales coated with fine hairs
  • Lateral buds located within the base of the leaf stalk pressed against the twig
  • Leaf scars V-shaped, margins meet around the twig

Length

  • Terminal bud 3–8 mm

Colour

  • Brownish-green or purple
  • Hairs white

Twigs

  • Winter twig - Manitoba maple

Form

  • Hairless, shiny
  • Moderately stout
  • Often covered with a waxy powder

Colour

  • Greenish-purple or brown

Flowers

Form

  • Small
  • Without petals
  • Pollen flowers on slender single stalks in lateral bundles (fascicles)
  • Seed flowers in loose drooping clusters with a central stem (racemes)

Colour

  • Sepals pale green

Structure

  • Dioecious

Floral timing

  • With or before the leaves

Fruits

  • Fruit - Manitoba maple

Form

  • Keys in drooping clusters
  • Wings incurved
  • Angle between wings usually less than 45°
  • Seedcase elongated, wrinkled

Length

  • Wings 30–50 mm

Structure

  • Samara
  • In joined pairs

Bark

Form

  • Smooth, with age becoming furrowed into narrow firm ridges

Colour

  • Light greyish-brown, with age becoming darker

Wood

Texture

  • Moderately light, soft, weak

Size

Height

  • To 20 m

Diameter

  • To 75 cm

Maximum age

  • 60 years

Tree form

  • Silhouette - Manitoba maple

Forest-grown

Trunk

  • Undivided portion of the trunk sometimes long, straight

Open-grown

Trunk

  • Dividing near the ground
  • Limbs few, long, spreading, rather crooked
  • Branching irregular

Crown

  • Broad, uneven

Root system

  • Shallow, fibrous
  • In deep soils, sometimes with a taproot

Habitat

Site

  • Lakeshores and stream banks
  • Seasonally flooded sites
  • Disturbed sites

Light tolerance

  • Intolerant of shade
Insects and diseases

Insects and diseases that are found most frequently and/or that cause the most damage in our Canadian forests.

Photos
  • Manitoba maple
  • Manitoba maple
  • Manitoba maple
  • Manitoba maple
  • Manitoba maple
  • Manitoba maple
Distribution map
Distribution map - Manitoba maple
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