Rooted, dense water weeds with slender stems and strap-like and pointed, whorly leaves – five leaves per whorl.
- English Name: Hydrilla
- Latin Name: Hydrilla Verticillata
- Propogate: Seeds, root and stem fragments
- Symptoms: Dense mat of water weeds with slender, pointed, whorly leaves
- Dangers: Most problematic aquatic plant in US, destroys fish and wildlife habitat