HI Alan this is a plant called eremurus robustus and as I understand it is not an agave relative. There is an Agave attenuate plant called the Foxtail agave or Lion's tail agave, that has a much broaded leaf structure for the base, closer to the agave plant structure.
There is an issue with Uploading Photos (attachjments). I am not sure what the problem is, and I am looking into it. You can still try to Create your Threads and Upload your Photos, but it is hanging up during the Upload.