Shumard oak

  • Latin name: Quercus shumardii Buckl.
  • French name: Chêne de Shumard
  • Synonym(s): Swamp red oak
  • Taxonomic Serial Number: 19417
Description

Leaves

  • Leaf - Shumard oak

Form

  • Base rounded
  • 7–11 toothed lobes
  • Separated by deep narrow notches  

Length

  • 12–20 cm

Colour

  • Upper surface dark shiny green
  • Lower surface paler

Autumn colour

  • Rich red

Margin

  • Toothed

Petiole

  • 5–7 cm long

Buds

  • Lateral bud and leaf scar - Shumard oak

Length

  • 6 mm

Colour

  • Very pale greyish-brown

Flowers

Form

  • Pollen flowers small
  • In many-flowered drooping catkins
  • Seed flowers small
  • Solitary or in few-flowered clusters (spikes)

Structure

  • Monoecious

Floral timing

  • With the leaves

Fruits

  • Acorn - Shumard oak

Form

  • Acorns large
  • Cup shallow, saucer-shaped, enclosing about one-third of the nut
  • Slightly hairy

Length

  • Acorns 15–30 mm

Width

  • Cup 15–30 mm

Colour

  • Cup grey

Bark

Form

  • Deeply furrowed

Colour

  • Dark grey

Size

Height

  • Medium-sized to large trees
  • To 40 m

Tree form

Forest-grown

Trunk

  • Buttressed

Crown

  • Open, wide-spreading
  • Massive branches

Habitat

Site

  • On lowlands, along streams
  • On poorly drained, heavy soils

Range

A few locations in southern Ontario north of Lake Erie

COSEWIC Status

Special concern

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