I have a hard time believing this is indeed Agave guadalajarana. I think all three pictures here are of the same plant or of a similar plant at the UC Berkeley Botanical Gardens, and its way too green for A. guadalajarana and the leaves are not the right shape and how they carry the teeth, at least for any A. guadalajarana plants that I have seen.
Check this link out and let me know what you think:
http://www.agaveville.org/view...
I suspect this plant or these plants are all examples of A. bovicornuta or another similar Crenatae agave.
