Background information Edit
This planet was only mentioned in dialogue.
According to the script, the pronunciation for Lamenda was "lah-MEN-duh". 
According to Star Trek: Star Charts ("United Federation of Planets III") and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the Lamenda system was located in the Alpha Quadrant. The primary was a F-class star. In the reference works, Lamenda was spelled as "Lamemda". In the late 24th century, it was an independent system.