Take a small straight sapling and ring the bottom with your knife to kill it. When it turns solid brown, cut it and add it to your supply until you have a few shafts to work. Scrape the bark and bumps off using whatever method works for you. Wrap about two inches from the end with rawhide or sinew. Split into 4ths back to the wrapping with a sharp thin blade. Work a leather thong in between the four tips and slide down to the wrapping. This will spread the tips apart. Sharpen them and cut barbs into them. Heat treat the whole thing, making sure to get the tips really well. Fletch with a strip of any thin skinned fur wrapped around the arrow three times. Wrap ahead of nock for support.
Best easily made small game arrow for someone on the move that I know how to make. The arrow hangs up in the critter bringing squirrels and such down really well. They don't last long, but you can make them pretty easily and quickly. We used these off our old FG stickbows when we were kids. They shoot very well at close small game distances.
Closest I have seen documented are arrows from a tribe in Brazil if I remember correctly, but I did not care about that back then. I have never researched whether or not that type was used by the native peoples of Missouri or not.
They make good small fish arrows also.