This is Bamboo.
If I had known how difficult it was going to be to identify I would have collected a few more identifying parameters beyond the picture. I have narrowed it down to the genus Phyllostachys but to get more specific than that I will need to get a DBH tape and take a closer look at the rhizomes. Because much of the bamboo looks similar, growth from the root can help determine the exact species. Although I have a picture of the stem and lanced leaves (typical of Phyllostachys) I do not have a picture of the roots, I didn’t even take a look at them. I was surprised to see the diversity of bamboo that grows in Texas, although most of the bamboo is planted for it’s looks and sometime used instead of a privacy fence, most of it is invasive and can do damage to wetlands and marshes.
To see the iNaturalist post click here