Noun: purple loosestrife
- Marsh herb with a long spike of purple flowers; originally of Europe but now rampant in eastern United States
"Purple loosestrife has invaded many American wetlands";
- spiked loosestrife, Lythrum salicaria
Derived forms: purple loosestrifes
Type of: loosestrife
Part of: genus Lythrum, Lythrum
Encyclopedia: Purple loosestrife