"Dead trees standing out of the gray water trailing gray and relic hagmoss"
by cm

Big Cypress National Preserve, Florida
Creative Commons Attribution Share AlikeBig Cypress National Preserve, Florida - Credit: Ianare Sevi, 2005
This "dead swamp" supports the idea that they are on Florida's Gulf Coast. 

The word "hagmoss" seems to be an invention.  This is probably Spanish-moss (also called graybeard), which is not a true moss but an epiphytic plant.