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   Hygrophila polysperma aquatic plant
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    Alternanthera philoxeroides (Photo: Lalith Gunasekera) - Click for full size Alternanthera philoxeroides (Photo: USDA ARS, www.forestryimages.org) - Click for full size Alternanthera philoxeroides (Photo: Charles T. Bryson, USDA ARS, www.forestryimages.org) - Click for full size Alternanthera philoxeroides closeup of flower (Photo: Gary Buckingham, USDA ARS, www.forestryimages.org) - Click for full size Alternanthera philoxeroides - Click for full size Alternanthera philoxeroides (Photo: Lalith Gunasekera) - Click for full size Alternanthera philoxeroides flower (Photo: Robert H. Mohlenbrock, USDA-NRCS PLANTS Database, www.forestryimages.org) - Click for full size

    Hygrophila costata


    Ramey (2001) states that, "Hygrophila costata is entirely emersed or terrestrial. It is much larger and taller (to 80 cm), mostly erect, with much larger leaves, and flowers along the entire stem (rather than just at the top)."
ISSG Landcare Research NBII IUCN University of Auckland The Global Invasive Species Database is managed by the Invasive Species Specialist Group (ISSG) of the IUCN Species Survival Commission. It was developed as part of the global initiative on invasive species led by the Global Invasive Species Programme (GISP) and is supported through partnerships with the National Biological Information Infrastructure, Manaaki Whenua-Landcare Research and the University of Auckland. Conditions of use.