They are related in so far as they are both oaks. Quercus robur is the Common Oak and Q.suber is the Cork Oak.
Quercus suber
Quercus Suber
Quercus suber the Cork Oak.
Cork is the bark from the Cork Oak (Quercus suber)tree.Please access the related link below for more information:
The bark of Quercus suber, commonly called the cork oak, is the source of cork.
The cork oak, Quercus Suber, is native to Southern Europe and North Africa.
Scientific classification:-Kingdom:Plantae(unranked):Angiosperms(unranked):Eudicots(unranked):RosidsOrder:FagalesFamily:FagaceaeGenus:QuercusL.
http://science.howstuffworks.com/question550.htm Cork comes from the bark of Quercus suber.
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Marcellus Suber's birth name is Douglas Marcellus Suber.
Cork is an impermeable, buoyant material, a prime-subset of bark tissue that is harvested for commercial use primarily from Quercus suber (the Cork Oak), which is endemic to southwest Europe and northwest Africa.
The cork oak (Quercus suber) is a North American tree that has corky bark. It is known for its thick corky bark that can be harvested for cork production.