Pepper spice varieties
So far, the best reference I found is Wikipedia.

Black pepper (Piper nigrum) has the following varieties:


Black pepper
White pepper
Green pepper
Orange pepper and red pepper


Cubeb (Piper cubeba), or tailed pepper

Long pepper (Piper longum)

Sichuan pepper (Zanthoxylum)

Pink peppercorn (Schinus molle, Schinus terebinthifolius)