What are these called?

[alpacinou]

What are these called? "Grass"? How can I describe them?

Is this okay?

Grass had risen up between the cobble stones.

 

[emsr2d2]

It's grass but I wouldn't use "risen up".

Grass is growing between the cobbles/cobblestones. Some of them might be weeds, of course.

 

[probus]

Perhaps it's the limited resolution on the little screen of my phone, but it looks more like moss than grass to me.

 

[tedmc]

Those are more likely to be weeds growing through (the crevices of) the cobblestone pavement.

 

[5jj]

I blew up the part alpacinou circled as much as I could. The green could be moss, grass or weeds, or possibly a mixture of all three. growing between the cobbles/cobblestones.