Someone mailed me a small aloe start, with the label 'Aloe aculeata marlothii ssp. marlothii' (yeah, I have no idea what that was about). Here's a picture:
Looking up plants this young online, there seems to be a lot of variability in each species, and they look similar. A. ferox also looks similar. I have a very similar looking plant that was labeled 'Aloe marlothii', pictured below:
Now, being in Pennsylvania, I don't see many species of aloe growing. I do not know what the characteristics of these species are, or how to differentiate between them at a young age like this. Can anyone enlighten me?