Agaveville

I'm hoping to collect some wild growing agave to plant on my property to get a headstart on growing time. Agave are declared weeds in Australia so I don't anticipate any pushback. Hoping to confirm or correct my amature identifications. I'm thinking they are all Americana or Americana var
Americana? Americana+var Americana? Really hoping these are young Americana. They would be super easy to collect.

Some of these may be A. mapisaga.

Are you referring to the plants behind the street sign? I haven't had a closeup look at these yet. I can't find any info about that species here in Australia. Could be a private import as that clump is on private property.