Mike,
I think that new western garden book came out with a cd that was loaded with pictures and botanical names that you could copy and paste onto exel. It was a very good program, sunset also came out with a smaller version of landscape shrubs, ground covers, and trees. sometimes you can get some of the local nurseries to send a list of plants via email and they will send it in an exel format,
that you can copy and paste from.
-Guy