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willis-bridges
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Basic Info
• Also called water nut or water caltrop
• Native to Eurasia• Introduced in late
1800’s• Noxious
Reproduction
• Seeds germinate in the spring• Produce hard, nut like seeds in July• Seeds can remain viable in the sediment for
up to 12 years• Seed dispersal by water, animals, and humans
Threats and Management
• Aggressive, prolific reproducer• Creates light impenetrable mats of vegetation• Coordinate with PA state agencies• Public education• Include on invasive species list