I second Up North's call of Table Rock. Being from Missouri, I see a lot of these late archaic blades. The well rounded shoulders, slightly expanding stem, and size, strongly suggest Table Rock. Most specimens exhibit a slightly convex base, but I have seen some that were straight as this one appears to be. Curious, was this a field find or associated with a possible camp site?
http://www.projectilepoints.net/Points/Meadowood.htmlFound in a feeder creek. I have only hunted it a couple times, but it's produced a couple nice pieces. I also found this blade. View attachment 1886506