Northern pin oak

  • Latin name: Quercus ellipsoidalis E.J. Hill
  • French name: Chêne ellipsoïdal
  • Synonym(s): Hills oak
  • Taxonomic Serial Number: 19327
Description

Leaves

  • Leaf - northern pin oak

Form

  • Lobes often constricted toward the base

Length

  • 7–12 cm

Petiole

  • Slender
  • 3.5–5 cm long

Buds

  • Lateral bud and leaf scar - northern pin oak

Length

  • Terminal bud 4–6 mm

Twigs

  • Winter twig - northern pin oak

Form

  • Hairy when young

Colour

  • Bright reddish-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 - northern pin oak

Form

  • Cup enclosing one-third to one-half of the nut
  • Tapering to a stalk-like base

Length

  • Acorns 12–18 mm

Width

  • Cup 10–15 mm

Bark

Form

  • Shallowly furrowed, with narrow vertical plates

Colour

  • Inner bark light yellow

Habitat

Site

  • Sandy soils in open, disturbed habitats
  • Resembles pin oak, but more likely to occur on upland sites

Range

Uncommon in Canada
Ontario west of Lake Superior and north of Lake Erie

Photos
  • Northern pin oak
  • Northern pin oak
Date modified: