would be an interesting cross! I have a scabra x, a lophantha (the original long leaved univittata) and Manfreda tamanzanchulub all in bloom. Lophantha selfs so will try it's pollen to the manfreda. Have had no luck in the past though.
Yucca recurvifolia and various filimentosa/flaccida types also in bloom. Treculeana is done.
My beschornia have never bloomed.