Sage, Clary Sage -- what's the difference?

[Godgifu]

I take it there is a difference, as their Latin names aren't terribly similar. I don't think I've ever seen nor gotten a whiff of pure clary sage, however (it's always used in a blend of some kind.)

I noticed that wo of my favorite bubble baths have clary sage, however, so I'm thinking I should look into the stuff. Does it resemble normal sage?