Solved Riverside plant

My boss wants to know what this plant is by his local river.
He said it's spreading fast.

Sorry it's sideways.

TIA

 

That's the horizontal horsetail

 

Hi @Pushkin it's actual name is "Equisetum Telmateia"

Equisetum telmateia Giant Horsetail PFAF Plant Database
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Extremely invasive a an absolute sod to get rid of.

 

@Pushkin a link on how to remove it

How to Kill Scouring Rush Horsetail

 

I think we've tried everything known to man to try and get rid of the retched things but every year they reappear. I hate them.

 

The vertical horsetail

 

Remind you of anyone you know??