Iris Cohen writes
There is an equally or more poisonous tree native to Florida and the
Caribbean, the manchineel, Hippomane mancinella. People are warned not to
sit under it, because dripping sap can cause a severe rash. The two trees
are not related.

Stewart Robert Hinsley schreef
There's always _Tilia tomentosa_ (from S.E. Europe) which is reported as
killing (bumble) bees. One anecdote is that there were so many dead bees
under the edge of one tree that there was a circular zone of enhanced
soil fertility the next year.
--
Stewart Robert Hinsley

Well, carefull here. They cleared that up. The bees were not poisoned but
died of hunger. Linden trees are especially popular late in the season when
they are just about the only source of nectar. Nevertheless what nectar
there is is not enough to save the bees from collapsing on the spot.
PvR