:? Eve, there has to be another word in front of japonica such as Chaenomeles japonica, the actual japonica bit means that the plant species probably orginated in Japan when it was first discovered.
As Lany says though, probably best to keep it away from bunnies, you know, 'if in doubt, leave it out' :wink: Most houseplants are poisonous to pets, if not immediately fatal, then over a long term basis causing internal damage to organs such as liver, kidneys etc. Same goes for outdoor plants, unless you are certain they cause no harm to buns, get rid of them. Always better to be safe than sorry.