Jack,

Here's a little follow-up on Giant Hogweed:

The seeds are used in Iranian (aka, "Persian") cookery. They're known
as "golmar" and are said to have a warm anise-like flavor. That makes
sense -- most of the seeds of the Apiaceae contain traces of Anethol
(which has a licorice-like quality) and/or Carvone (which provides the
warm taste of caraway).

Supposedly, one plant can produce 10,000 to 20,000 seeds in one year.

Gary