Help with identifying a grass in my yard
I have some pics of a type of grass that is growing in my back yard that I would appreciate some help with identifying. Some background first... We are in Colorado Springs and I think it's zone 5b. We have a hill in our backyard that we are letting go for now and just keeping the weeds low, favoring focusing on a lower flatter portion of the yard for now. We have a sandy type soil too.
This past month we have had a grass come up on our hill that I would like to know what it is because it seems to be very drought tolerant and nice enough to keep around if I can control it and it doesn't become a problem. It looks like a bunch grass (I think that's what it's called) too.
Hopefully the pics will suffice, but let me know if you need better ones, closer ones, root pics. I tried to take pics of several different sizes and stages.
Thanks in advance!
Here is a link that might be useful: Here are the pics