It would be easy to mistake this unassuming monocot for a grass (family Poaceae). It’s actually a sedge (Carex sp., Cyperaceae). One easy way to distinguish them is to cut a shoot and examine the cross-section. Grass shoots are round in cross-section with a hole in the center. Sedge shoots are triangular:
Another similar type of monocot, rushes (family Juncaceae), are round like grasses but without a center hole. I learned a little poem in a plant biology class to keep them straight: “Sedges have edges, rushes are round, and grasses like asses have holes.”
This particular sedge produces spiky seed pods in autumn, as seen above. I suspect it could be Gray’s sedge (Carex grayi), but with hundreds (if not thousands) of species in this genus, at this point I’m not sure.