Compare to yuccas on CR 364 on other side of the mountain...
http://www.inaturalist.org/observations/2863466
Hope to follow these two locations and learn more about yucca taxonomy this year.
ECR Trail
Common on glades in county. This along road past Norfork High School near the White River.
Monument Hill State Park, I meant to search this area earlier to find in flower since it is very similar to the known location in Grimes County.