I thought some might find these resources helpful. I would not assume a plant is safe just because it is not on these lists. Instead, these lists are useful as a way to confirm if a plant should be avoided. Use due diligence to be sure your plant is safe by also cross checking “safe” plant lists for rabbits.
http://www.allearssac.org/pdf/poison.pdf
and
http://wisconsinhrs.org/wp/wp-content/uploads/2013/08/WHRS-Library_ToxicPlantsList.pdf
http://www.allearssac.org/pdf/poison.pdf
and
http://wisconsinhrs.org/wp/wp-content/uploads/2013/08/WHRS-Library_ToxicPlantsList.pdf