I'm sorry, but there's no way the wood that went into that furniture is what we're meant to think it is. It's clearly meant to look like someone just pulled the planking, complete with layers of paint and years of wear, straight from the side of a hull. But that can't be true.
Boat planking has one of a few specific shapes meant to contribute to a system to keep water out. There are no bevels, either for a caulking seam or a lapstrake overlap. No signs of baten-seam or dual-planked construction. Where multiple planks join there are neither butt blocks nor the fastener holes to indicate they were ever there. A boat built with planks like this is known technically as a "sieve." Certainly they could have reshaped and milled the edges of the planks after removing them, but then why do we see such lovely, worn, distressed-looking corners?
This could still be wood from wooden boats, of course. My guess would be the large timbers of a good-sized hull (fewer embedded fasteners to destroy your tools), milled, planed, sorted, graded, and then carefully painted and distressed to appeal to rich people looking for "colorful, casual, developing-world innovative recycling" as an accent point for their interior decorating.