Help with Yucca ID

[jons0027]

Can anyone help me ID these yucca? Found in my neighborhood in Richmond, VA.

With the trunks/stems I was initially thinking aloifolia or gloriosa/recurvifolia. After looking at photos of leaves online, I'm sure it's not aloifolia, & the leaves actually look skinny than gloriosa as well. Could it be just a super old filamentosa? apparently they can grow stems over time, but I had trouble finding similar photos of anything.

Thanks in advance! Yucca ID is quite difficult for me, especially when examples are so obviously mislabeled all over the internet, even from seemingly reliable sources.  (Side note, does anyone know why this is the case?)

[jons0027]

BUMP. 

[Silas_Sancona]

49 minutes ago, jons0027 said:

BUMP. 

Take a look at the descriptions of those sp. on iNat.  lots of variance depending on if they're growing in sun ( growth would be more compact ) vs. shade ( stretched out ). No doubt there is likely a " spectrum " of naturally crossed plants in habitat where two or 3 species grow in close proximity as well which will exhibit varying degrees of X parent influence in leaf/ floral/ or growth detail as well.

In such cases, DNA is the only true way to tell whether or not a particular plant is pure, esp. if bought in a nursery which grows their plants from seed. Plants started from stems/ suckers ( clones ) will generally be identical to the " mother " plant however.