On 21 Feb 2007 21:03:32 -0800, Mike S. wrote:
Does anyone know what I'm talking about? If so, could you tell me what
these things are called?

A tripping and mowing hazard? g

Try "picket fence edging", "flower bed edging", "garden edging".
I see it at just about all the chain hardware stores and big box home stores.
e.g.: http://tinyurl.com/2zbhz6 -or-
http://www.acehardware.com/category/index.jsp?ca
tegoryId=2602630&cp=2568444.2598671