Cursed Clover of Viesar shouldn't be in game
 

Just foraged a Cursed Clover of Viesar in The Overthere, which is LoY-era content.

Not true, there are comments for it on Alla in 2001:

http://everquest.allakhazam.com/db/item.html?item=5113

It was probably ingame, but not used for anything till LoY. Definitely cross check anything you find posted on the wiki first.

This like a lot of random foraged items was in game long before a use for it was found/created. Forage in TD and you will get a coconut that isn't used until Rogue epic 1.5 was introduced but its always been there.