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.