I know exactly what cartoon you are talking about. I can hear the flower making the "gluh glug" sound as it was strangled. Sadly, I can't think of the name.
It dawned on me today that this may well be the place to get my answer. I have been asking anyone with animation/cartoon interest for years, and I seem to be the only one who remembers it. This would have been aired somewhere in the late 70s/early 80s when I saw it, but I have no idea of its actual date, it may well be…