Grass in the Garden

I have two grasses that have started pestering my plants (and me). These are volunteers no doubt; brought in by birds or compost. I haven't been able to identify them.

One is very reed-y and can be compared to an invasive California pest Arundo donax (Giant Reed) although I don't know what it is:


The other grass can fool you into thinking it is left over greens from flowering spring bulbs. This one spreads quickly too but it sprouts individually with stubborn white roots.