Agave

Ok, thanks for the expertise!

yes, I know it's blue, I have one in my garden, i'm pretty sure that it's A.attenuata! sooo beautiful colour!!

@PatriciaPi: Thanks, I put it as that for now, but the Agave attenuata seems a bit more green than this was. This was a bluish-green.

Would you say Agave americana?

http://en.wikipedia.org/wiki/Agave_ameri...

Thanks: I actually forgot to say it was in California!

Agave. Surprising that it tolerates the winters there!