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Wand loosestrife
Lythrum virgatum

Wand loosestrife (Lythrum virgatum) is an invasive plant. It is a native of Eurasia and was first detected in Washington in 2002.

Purple loosestrife displaces native vegetation through rapid growth and closing open water space. Important wildlife food plants such as cattails and pondweed are displaced or shaded out by loosestrife. Generally, it becomes a virtually, monospecific stand, degrading native animals nesting and foraging sites.
Summaries of State Plant Protection Laws and Regulations
Nebraska   Tennessee   Washington   Wisconsin