It appears to be in the mint family. Rub the leaf vigorously and not whether it smells minty. I need it in flower to do a proper ID, so it might be quicker to take one to a nursery for ID.

This looks like a true mint. It should smell very minty when rubbed. Unfortunately this group of plants is quite diverse, so the final give-away is the scent. My Egyptian mint looks like this and has a very strong aroma, but other mints also flower in this pattern. It does belong to the edible mint group. These are used as condiments, jellies, syrups, herbals etc.