Here you go:http://fishing.about.com/od/bassfishing/a/bass_species.htm
8 species and several subspecies within some of the species. Actually, LMB are sunfish.
It is very difficult to distinguish between Florida strain and the Northern (native) strain of LMB. They also readily cross yielding a "hybrid" that really isn't a true hybrid but often has the best characteristics of both, i.e. very aggressive (like the Northern) and grows to large sizes (like the Florida).
In Texas I've only seen 3... the LMB species, spotted bass, and guadelupe bass and have caught Florida, Native, Hybrid, and Kentucky bass subspecies.