Quercus variablis, Chinese cork oak

Chinese cork oak, from the Far East, offers the unique combination of corky bark and chestnut-like leaves in an upright tree.

It favours dry soils and has proven a good tree in Canberra clay, weathering the city’s dry years rather well.  This deciduous tree starts as an upright, pyramidal form to later develop a more spreading crown.

The signature bark is corky, pinkish grey to brown grey of a most satisfying texture.

This oak needs full sun, like most oaks, growing long, narrow leaves to 15cm and makes a great shade, street, avenue and farm or woodland tree.

Other features include:

  • leaves are shiny, green, quite similar to those of the chestnut, but with grey undersides and only tiny bristles at the end of each vein
  • good yellow to brown autumn colour
  • slow to moderate growth
  • small, round acorns 1-2 cm across almost fully encased in the very hairy cup
  • a straight bole to 1m DBH
  • is tolerant of dry soils and thus drought to about 500mm p.a.
  • fire tolerance, for the bark offers good protection
  • moderately shade tolerant
  • the dead wood of this tree is used to grow the “mushroom of immortality” in China. (Ganoderma lucidum)

Chinese cork oak is cold hardy to around -25C  so suits the tablelands and ranges of SE Australia. In its home range, it has grown to over 200 years old.

 

Tree shape

Spreading and rounded

Mature size

Large 12-20m

Growth rate

Slow-Moderate

Use

Shade, carbon store, firewood, ornamental, windbeak, acorns

Soil type

Dry loams and clays

Water

Moderate to drought hardy

Foliage

Lanceolate, Bristle-tipped margins

Origin

E Asia