Agave attenuata

I love this most unusual plant growing at daughter Debbie's. It is an
an Agave attenuata. It is right in the center above the yellow flowers. There is an enormous spike coming out of it, which curves up and over and forms an arch. It ends just behind the cyvad on the bottom right. This is the flower stem - the tips did have little white flowers which have now died off. It must be at least 5 feet long.