CEDAR DOES SWIMMINGLY WHEN IT'S PUT TO USE AT SEA

White cedar trees always have accumulated knots, but not just the kind that grow on trunks.

Wood from white cedars once was used to plank ships because of the wood's light weight and resistance to water decay, says Georgia-Pacific Corp, a forest products firm.Today, the wood is used to build posts for boat docks, fences and piling. Native to the Atlantic seaboard, white cedars usually grow along small streams and near freshwater swamps.