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I believe I was able to ID a plant on my property from this article, but I still need to do a bit more looking to be certain and I will keep an eye on it to see if it blooms. My plant, growing next to the road in a heavily wooded area (mostly pine with some hardwoods) near Houston, Texas, appears to me to be a Soaptree Yucca based on your photos and description.
Thanks again! Great info that I will bookmark for future use.