Brackenweed

As the name might suggest, Brackenweed grows best in brackish waters, preferring slightly warmer temperatures than normal. It can be found in copious amounts at the Bay Of Telluride. it is a medium-sized sea weed plant that provides ample environment and shelter for small species of fish and marine life. It also acts as a filtering agent of the surrounding waters, absorbing harmful substances and neutralizing them through internal biochemical processes. 
While it has been used by humans for thousands of years as a food item and for medicinal purposes, recent efforts to commercially farm the plant have gained popularity amongst coastal towns in the Iron Coalition. Once environmental conditions have been properly dialed in, Brackenweed grows surprisingly fast, and offers a high yield compared to other domesticated plants.