On Fri, 22 Jun 2007 23:02:15 +0100, "Bob Hobden"
wrote:

Fully hardy perennial with a long flowering season that will gradually
increase in size, even move itself around the border over time, but is never
badly behaved.

Never underestimate a plant's ability to make itself unwelcome, some of
the species are quite aggressive weeds here in coastal central
California.
--

09=ix