A common species above the normal high water mark on muddy shoreline.
Once you start to look closely at the vegetation around the high water mark on salt marshes you start to find some more specialist species growing. Annual seablite (Suaeda maritima) may not be much to look at but it is a common and yet much overlooked plant because it does not have nice flowers! In fact, it appears just a dull, green, stringy mass! Look closely and you may find the tiny flowers.
Once the spartina grass has established on a muddy shoreline and started to bring some solidity to the mud so annual seablite is one of several species that can establish itself. This causes the ground level to rise above the normal water level to create the vegetative islands that you can see when you look over a salt marsh. Although resistant to salt annual seablite tends to grow above the high water line where it rarely gets covered.
This is a common plant in its chosen environment.