To summarize the solution:
Copy directories remotely with SCP in this way
scp -r user1@ip:source_directory user2@ip:destination_directory
This will copy the folder 'destination_directory' INTO the folder 'source_directory'
To clarify the previous posts:
shows you the manual page for scp. while reading a man page, typing '/' followed by text will search (ie '/-r' searches for the -r option in the man page)