Chrysanthemums are commonly known as mums or chrysanths.
They are originally from North Eastern Europe and Asia. There are countless horticultural cultivars and varieties. [Source: Wikipedia]
So can rabbits eat Chrysanthemums at all?
No, they cannot eat this flower at all.
They are actually poisonous to bunnies and will harm them if they were to consume this flower.
Make sure your bunnies stay far clear of this flower and do not let them eat this flower if it is in your garden or house as a decorative plant.