I'm clarifying an earlier error.
Originally, I called this a shrub. Then, when I noticed the structure of the shoot, I thought it was some type of grass, specifically a reed. That was wrong, too, but surprisingly close. When I conferred with someone that knew more about it than me, I was told it was a bamboo. So, it is a grass, after all.
I want to say it's a Brachystachyum densiflorum, but I am not sure of it and so won't.