The message
from martin contains these words:

On Sat, 25 Oct 2003 16:02:07 +0100, Janet Baraclough
wrote:

Whereabouts have you seen heracleum mantegazzanium growing along miles
of grass verges?

In the Netherlands.

Are you sure you haven't confused it with robust examples of other
hogweeds? They can grow 6ft tall or so, but hm is HUGE. If you mean
grass verges on roadsides, I would have thought that hm growing on them
would reach well out into the roadway and brush pedestrians or cyclists
with awful results.

Janet.