arum lily

Each orange segment separates and contains a seed usually surrounded by mucilage. You could squeeze the seeds out of the orange flesh and wash the seeds in a flour sieve to remove the mucilage. Sow in a seed tray or pan just below the surface of a loam/compost mix and keep in a cold frame. They should germinate next spring.

It takes quite a while for any plants to grow to flowering size though, probably a couple of years. But in gardening, patience is a particular virtue!