A "giant cypress" is a particularly large tree in the Cupressaceae family. They are typically twice the size of the average cypress tree in the area.
In Florida's Corkscrew Swamp Sanctuary, an average old-growth cypress tree is 11 to 12 feet in circumference. By comparison, giant trees at the sanctuary are 17 to 23 feet. The largest giant cypress tree in Alabama measures 27 feet around. Giant cypress trees are conifers located in northern temperate regions. Conifers are a taxon of the Kingdom Plantae, meaning plants. One of the most important traits of conifers is that they produce distinctive cones as part of their sexual reproduction.