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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
Characteristics
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…
Remove nutrients directly from water.
Reproduction includes Sexual-- seeds Asexual– over wintering stems and the creation of
daughter plants
Often Confused with Frog's-bit, Limnobium spongia
native of golf states
History Native of South America Introduced to Florida in the
early1880’s. Became a popular plant for
gardens and domestic ponds.
Example of a large mat
Located in Milnerton, Cape
Town in South Africa
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
U.S. Distribution of Invasive Populations
Uses
Has been used by waste treatment plants It is a ornamental plant Possible food source
high energy and protein content
Impact 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…
Has also invaded Central America North America Africa India Asia Australia New Zealand
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…
moth (Sameodes albiguttalis)two weevil species of the Neochetina spp.
Thanks to:
http://plants.ifas.ufl.edu/hyacin2.html http://www.ecy.wa.gov/programs/wq/plants/
weeds/aqua010.html