A Google search turned up this website as well as several others:
http://www.ecy.wa.gov/programs/wq/plants/native/nuphar.html

Tom Marko
Olney, MD
Montgomery Bird Club (MOS)
Email: 

-----Original Message-----
From: Maryland Birds & Birding [mailto:[log in to unmask]]On
Behalf Of Sarah Anderson
Sent: Wednesday, May 26, 2004 8:37 AM
To: 
Subject: Re: [MDOSPREY] spatterdock, explained

In a message dated 5/26/2004 7:59:55 AM Eastern Standard Time,
 writes:
spatterdock."  Just tell me...what is it?  The
> grass-like vegetation, or the leafy stuff?  Let me know. This has been
> driving me crazy.