Humor Czar writes:

<< Ivory, as one of my neighbors in Joisey City used to say, is indeed Bad
Shit.
  It sends its insidious little roots and suckers into mortar joints, siding
 joints, etc., loosening everything up, and distributing water over the place
 into your Historic Structure, and keeping everything wet all the time. >>

OK, Mister ... give us a specific example where this innocent little plant
did all that.  Preferably in Manhattan.  NY Athletic Club doesn't count.

Christopher Green