edible flowers?

Are there any edible flowers that my rabbit can eat that grows in the united states? Which ones are benificial?
Also, people said rabbits can eat clovers. When they say clover, do they mean like everyday, green, backyard, 3 leaved clovers?

I'd stear away from clover as it is high in calcium & can cause sludgy wee. This is the list I use but is no means exhaustive

Roses
Lavender (not pregnent mums)
Pansey
Marigold
Nasturtium
Most herbs
violet