Chara looks like a plant life structure because of its stem but the vegetation is in the Algae (alga) family.
Chara also known as muskgrass is an algae instead of a rooted plant life. Chara can be controlled with Cutrine Plus Granular a chelated copper form that is an algaecide instead of a herbicide. Treatments for Chara are less expensive than other herbicide treatments. Make sure of your vegetation before you treat. It could save you money. Chara can be treated with 30lbs of product for 1/2 acre.