These cacti are at the Mt Cootha Botanical gardens under th sign of "Prickly Americans". Ha Ha ha (I know, very lazy and unimaginative to just go over to the gardens to get some 365 pics.)
Hey, I wouldn't call it lazy to drive 5 mins for a picture. It's great to have a fall-back-on resource for 365 pics and obviously the Gardens are an excellent choice. This "prickly American" is proof of it.