ANBG South Annex. Very large colony of perhaps a thousand individuals. Many plants had aborted, but at least two (such as the one pictured) appear to have flowered this year. A. collinus?
May well be A. collinus given its at flowering stage. Didn't do very well this year, only a few flowered and of those most aborted or were eaten. I have seen A. exsertus in the Annexe.