This one could be one of the hybrids which have my #332 Yucca filamentosa as the pollenparent? I have a few of those hybrids in the garden, but I do unfortunately not have the pollenparent #332 anymore, it's dead and gone. The forms of Yucca filamentosa (ssp. concava) which have spathulate leaves, does not like it up here :-( We did however sown some more seeds from another location in North Carolina last week, I hope that some of those will survive for us.