Aquatic Plants

This list includes updates as ratified at the May 17, 2018 MISC Meeting.

Key CodeScientific NameCommon Name
* Aldrovanda vesiculosaWaterwheel plant
* 1 2, 3* Caulerpa taxifoliaMarine Macroalgae
2Didymosphenia geminataDidymo, Rock Snot
* 2* Egeria densaBrazilian Waterweed
* 1, 2, 3* Eichhornia crassipesWater Hyacinth
1, 2, 3Hydrilla verticillataHydrilla
Iris pseudacorusYellow iris
1, 2Myriophyllum aquaticumParrot Feather
2, 3Myriophyllum spicatumEurasian Water-Milfoil
Pistia stratiotesWater lettuce
2, 3Potamogeton crispusCurly Leaved Pondweed
* 2, 3* Prymnesium parvumGolden Algae
* 1, 2, 3* Salvinia molestaGiant Salvinia
Trapa bispinosa var. iinumai (Trapa sp.)Water chestnut
1, 2, 3, 4Trapa natansWater Chestnut

Key:

* Red Alert species: Species not yet established in Maryland but considered to be of high risk.

  1. Currently Regulated by state and/or federal law
  2. Widely recognized by biologists and natural resource managers to degrade natural resources and/or negatively impact native species
  3. Known to have a negative economic impact on agricultural or natural resources
  4. Known or potential negative impacts on human (or animal) health