Water Shield

Water shield is a rooted plant with floating oval or round shaped leaves that are a vibrant green on top with purpleish-red undersides. Small purple or pink flowers extend on a long stalk above the water. Water shield is also commonly called “snot grass,” due to the unusual and distinctive gelatinous or slimy covering on its roots and stems.

Also known as: Water snot, water target, dollar bonnet, purple wen-dock, snot grass


  • 1

    Recreational activities such as swimming, fishing, and boating can be impaired and even prevented.

  • 2

    Dense mats of Aquatic weeds can block sunlight from native submerged plants.

  • 3

    Aquatic weeds greatly detract from the aesthetic appeal of a body of water.

  • 4

    Excessive growth can lead to fish stunting and overpopulation. This occurs because the production of too much habitat prevents effective feeding of small fish by larger fish.

  • 5

    Aquatic weeds can cause fish kills.

  • 6

    Aquatic weed growth provides quiet water areas ideal for mosquito breeding.

  • 7

    Weeds impede water flow in drainage ditches, irrigation canals, and culverts and cause water to back up.

  • 8

    It can cut off sunlight to submersed plants and cut off oxygen to fish and other wildlife.


Water Shield can be found in most of the contiguous states.

Similar or Related Plants

It is frequently misidentified as Water Hyacinth .