The water hyacinth
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The Water Hyacinth. Eichhornia crassipes. Labeled one of the worst invasive plants in the world It is a member of the Pontederiaceae family A noxious species. Water Hyacinth. Characteristics. Mat forming, floating plant Spongy, waxy and glossy leaves

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The water hyacinth

The Water Hyacinth

Eichhornia crassipes

Water hyacinth

Labeled one of the worst invasive plants in the world

It is a member of the Pontederiaceae family

A noxious species

Water Hyacinth


  • Mat forming, floating plant

  • Spongy, waxy and glossy leaves

  • Doubles its population in as little as 12 days

  • 95% water, has a fibrous tissue

  • Is similar to the native frog's-bit, Limnobium spongia

Characteristics continued
Characteristics Continued…

  • Remove nutrients directly from water.

  • Reproduction includes

    • Sexual-- seeds

    • Asexual– over wintering stems and the creation of daughter plants

The water hyacinth

Often Confused with

Frog's-bit, Limnobium spongia

native of golf states


  • Native of South America

  • Introduced to Florida in the


  • Became a popular plant for

    gardens and domestic ponds.

The water hyacinth

Example of a large mat

Located in Milnerton, Cape

Town in South Africa

Location habitat
Location/ Habitat

  • Wetland plant

  • Grows in rivers:

    • Ponds

    • lakes

    • costal fresh water bays

    • marshes

  • It is available in Pennsylvania for purchase from nurseries

  • They are problematic to the ponds and lakes of Pennsylvania

  • The water hyacinth

    • Has been used by waste treatment plants

    • It is a ornamental plant

    • Possible food source

      • high energy and protein content


    • Damage

      • Disrupts commercial and recreational use of waterways

      • Much like algae their deaths lead to anoxic conditions

    • Future

      • Scientists are worried about the development of a cold resistant species

        • Likely because it reproduces sexually

    Impacted continued
    Impacted Continued…

    • Has also invaded

      • Central America

      • North America

      • Africa

      • India

      • Asia

      • Australia

      • New Zealand

    Biota control
    Biota Control

    • The use of herbicides is a common method of control

      • diquat

  • Other control methods involve the introduction of insects

    • They reduce to plant height and consume viable seeds

  • Biota control continued
    Biota Control Continued…

    moth (Sameodes albiguttalis)

    two weevil species of the Neochetina spp.

    Thanks to
    Thanks to: