Go to your options in the Salem client (CTRL+O), then click on the Radar Config tab and check the "hidden" items.
This will however make a lot of other items visible as well which were hidden by default and might make your minimap very cluttered.
The alternative is to go into the radar.xml and edit all items shown on the radar. Go to your Salem folder in
C://Users and you should find it there. I highly recommend making a copy of that file as a backup - just in case.
Open the radar.xml with a text editor, find the row that has the word LIME in it and delete it. Save the radar.xml and restart the client. It should now show lime.
Best,
Silynx