This is Agave “Kissho Kan” grows 12-18” high and wide, originates in Mexico, is hardy to 0 degrees. . You can see how small it is compared to the plant label. That’s a 4” pot. (Native Sons* grows it.)
“Boutique” agaves (is this LALA land, or what?) is a phrase from from an L.A. Times article by Debra Lee Baldwin (http://latimesblogs.latimes.com/home_blog/2010/01/boutique-agaves-small-agaves-potted-agaves.html).
She’s got a new book coming out this month on container gardening : Succulent Container Gardens. She’s my Muse, can’t wait to read it. Meanwhile, if you go to the LA Times article there are pictures of more classy small agaves including one that’s really spectacular, Blue Glow. (Native Sons)