Weed on a Floodgate

Close up view of a floodgate shown in "Where the Misawa River Flows into the Tama River".

 

When it rains a lot, the floodgate closes and shuts the stream off. The water carries a lot of mud. Some of it sticks on the gate. Then, some seeds reach here and have grown.

 

It should be tough environment for weeds, but they are refusing to give up.

 

Done