Oaks

Oaks
Pedunculate Oak (Quercus robur)[English Oak]

It is a long-lived tree, with a large widespreading crown of rugged branches. While it may naturally live to an age of a few centuries, many of the oldest trees are pollarded or coppiced, both pruning techniques that extend the tree's potential lifespan, if not its health.

Quercus robur' is planted for forestry, and produces a long-lasting and durable heartwood, much in demand for interior and furniture work. The wood is characterised by its distinct (often wide) dark and light brown growth rings. The timber is around 720 kg per cubic meter in density.

http://en.wikipedia.org/wiki/Oak_Marble_gall

Sessile Oak (Quercus petraea)

The wood is important, used for construction purposes (particularly timber framing), shipbuilding, and for making oak barrels for wine.









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