the american mountail laural, a herbasous shrub, (very similar when not in flower to azalia and rhodedendrums) is also poisonous, and its flowers and nectar are also.-- so much so, that the nectar will actually kill bees who eat too much of it.

which is fortunate, since the poisonus alkaloid (what ever its molecular compound) remains poisonous when made into honey! i don't know enough botony to know what compound it is, and if one can build up a tollerence to it. --(learned this from a tag on a plant at a botanical gardens)--

Mountain laurals have clusters of flowers, that look like little stars when they open. they grow wild as far north as southern NY, (but are at home down WW's way)