Its hard to tell from the pics, but that looks like giant reed. I believe Jackcrafty uses it for arrows now and then. I use it for atlatl darts. It's pretty common in Oklahoma that's for sure. If it's the smaller stuff (phragmites australus(sp?)) It will make arrows as well. However the phragmites is very thin walled and lightweight material. If its the smaller stuff, I have a build a long in the how to section on making arrows from it. If its the bigger heavier walled material, then Jackcrafty has a build along in the how to section. I hope that helps. Josh