It looks like it was a piece that broke off of a larger clump and laid on the ground for a few weeks before someone threw it out. The crown is flat and whitened and damaged from being upside down but the older leaves are thick and juicy and full of life.
I stripped of the bottom leaves to give me enough room to get the base to root.
I put it in a pot with another rescued plant that my friend Bill gave me for my birthday (thanks Bill). I love that kind of gift.
Aside from the older plant being red from the sun, it looks like these two could have grown up together. I love them. I think I'll move them to a shadier part of the yard for a while until the new plant gets used to the sun. I don't want that white top to get scalded.
I think that these are Aloe arborescens but I'll know more if they bloom next year.