West Indian marsh grass

Quick Facts

Scientific nameHymenachne amplexicaulis
OriginCentral, South America, West Indies
Introduction1970s, natural colonization (?)
Aquatic communityEmergent
HabitatWet soils to shallow water
DistributionSouth & Southwest Florida
Management effortMaintenance control
2013 public waters / plant acres:38 / 687

Environmental and Economic Concerns

  • Forms dense monocultures in marshes and along shorelines
  • Displaces native grasses because of its broader tolerance to wet and dry periods
  • Difficult to control when growing among native grasses because they are susceptible to the same control methods
Hymenachne amplexicaulis
Hymenachne amplexicaulis
Hymenachne amplexicaulis
Hymenachne amplexicaulis

Management Options

BiologicalNone available
MechanicalImpractical; plants grow in shallow marshes
PhysicalFire + glyphosate to control regrowth

Florida Fish & Wildlife Conservation Commission, Status of the Aquatic Plant Maintenance Program in Florida Public Waters, Annual Report – Fiscal Year 2009-2010.

Last updated: 30 June 2014