On Mon, 20 Aug 2007 22:10:42 CST, Phyllis and Jim
wrote:

Joe,

I followed your link. That IS what I call water celery. Hal and
Marco, take a look and see if it is what you are thinking of. The
link also describes its hardiness to zone 8.

Jim

It survives here in Zone 7a. I have the less hardy kind, Flamingo. It is
sometimes called water parsley, but looks similar to the picture shown,
only has pink fringe along with the green and white. ~ jan
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Zone 7a, SE Washington State
Ponds: www.jjspond.us