Cypress is one of the few tree species native to south Florida that is viable for woodworking. Luckily, it has some very useful properties, particularly for outdoor applications.
Bald Cypress, the species native to much of the southeastern United States, contains a fragrant chemical called "cypressine" which repels insects and mold, making it a great choice for any piece of furniture that will be exposed to the elements. Although it is a "softwood", it is relatively hard and has a great strength to weight ratio.
Pecky cypress is the term for Bald Cypress lumber that has long, irregular burrows and other natural "imperfections". While some may see this as an flaw or blemish in the wood, I think that it creates a captavating natural beauty.
The cavities are caused by a fungal attack while the tree is living but ceases to occur when it falls or is felled. It does not materially affect the strength of the wood, so in years past, pecky was was cast aside or used for less visible applications. However, it is now a highly sought-after specialty lumber and it commonly utilized in paneling, furniture and more.