Took this shot some years ago. Didn't know the real name of this lime until today. Looks like it's in bloom. We used to call it 'thaiko kam'. Always love the smell of the leaves. Use it as a natural deodoriser in the car. While going through the papers this morning I read about Kaffir Lime, and decided to search Google. And presto!
I found this: http://www.uni-graz.at/~katzer/engl/Citr_hys.html