Once greeted with frank incomprehension by the art-going public, Martin Creed has now become something of a British icon, beloved for his dry wit and self-deprecating persona. Give his downbeat, almost-not-there-at-all conceptual works just a little time, and you may well find yourself laughing aloud, while remaining unsure of exactly what the joke is. This is certainly the case with this little arrangement of cacti, the bare minimum of a botanical taxonomy. As is often the case with Creed’s work, it’s possible to read in broader meanings – such as our tendency to rank everything around us into hierarchies – while sensing that such acts of interpretation are in themselves slightly ridiculous.