And there are two of them getting ready to flower. It is hope that they will flower together so that some cross pollination will result in fertile seed.
Arum lilies have flowered in the gardens before and they have flowered elsewhere. The Sydney Botanic Gardens had a successful flowering in 2004.
The tip of the spadix has grown considerably and the bract dropped off today. It's now a question as to when it will open. The best guess is the end of the week or on the weekend.
Although the flower will be spectacular, it won't last more than a few days. During that time it will produce a foetid odour reminiscent of rotting meat. The pollinating agents are probably blowflies of the family Calliphoridae. We will keep close tabs on this phenomenon and report back on the pollinators, should they show up at the flower.