Cool huge grass plant with giant flower
What you have is a beautiful Yucca species specimen. There are 40-50 species of yucca plants, including the famous Yucca brevifolia (Joshua tree).
The Florgeous website has a wonderful introductory tutorial about yuccas.
Best of luck and happy gardening.
Thank you for that information and help!
It’s great to be able to get help this way.