Mystery 'grass' needs an ID please.

in Plants
Saw this 'grass' growing in some rough gravel near a road.It stood out because the sun shone on it to make it a stunning lime green.
But I am now wondering if anyone knows what it is?
Maybe from bird seed perhaps.




But I am now wondering if anyone knows what it is?
Maybe from bird seed perhaps.




“Every day is ordinary, until it isn't.” - Bernard Cornwell-Death of Kings
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If you live in Derbyshire, as I do.
I think it may be a grain of some sort growing in the same way that perhaps wheat would grow as a single stalk.It was not clump forming at all.
I may have to go back and yank one out of the gravel!!!
It is not clump forming so still think it may be some sort of annual wheat.
May give someone an idea of what it might be!
It is about a foot or so tall.
Looks like someone may have chucked their budgie cage contents onto the gravel!