Hey, wwh. When checking out whether sweet gum and black gum should be one or two words, I came across another botanical listing in which you can list beginnings of genus and species.

For instance, if you wanted to track down Quercus alba--and understand just the derivation of 'Quercus,' you wouldn't enter 'Quercus,' but just 'quer'. This lexicon will trace all the 'quer' words.

Here's the url, worth at least a quick browse:

http://www.cgriffith.net/SearchBases