I really, really don't want to go down the grass ID rabbit hole. There are so many species, and they don't have big, obvious flowers. But from time to time I'll be unable to resist the urge to take and post pictures, in the hope of making life a bit easier for other nature enthusiasts. Unless I blow the ID, that is; please take the names I provide with an extra grain of salt.
The images will be in alphabetical order by genus and species. Hover over a photo series with your cursor to control the images.
Feathertop (Pennisetum villosum)
A non-native species, introduced to the New World from the old as an ornamental. I found it next to a channel of the Rio Grande; presumably the first seed washed downstream.
Carrizo, Common Reed (Phragmites australis)
This patch of carrizo is growing next to an irrigation drainage ditch, itself next to the National Hispanic Cultural Center.