The node names differ from zone to zone even within the same tier, so that's not really practical. A smart harvester should be able to differentiate between most nodes visually.
Example: Tin Clusters can be harvested from 12 different nodes: http://eq2.zam.com/db/item.html?eq2item=7b00ad6fe5ed7e8357fff2d45c1b7e17#Harvested_From