|Actually it is a Plant. To buy hydra tongue you must to say hydra tongue to Rose, you can't buy it via the trade window.
Player: buy hydra tongue
Rose: Oh of course. Come on. As if I were to believe that you want to buy a pest plant. Well, you really want to buy a hydra tongue for 50 gold?
Rose: You ... what ...? Erm, I mean, did I say 50 gold? I meant 100 gold! Do you want to buy this precious and rare hydra tongue for 100 gold?
Rose: Incredible ... I mean the beauty of the rare herb you just bought. Have as much fun with the plant as I will have with your 100 gold.
You see a hydra tongue. It weighs 1.00 oz.
It is a common pest plant in warmer regions.
Needed in a mission of The Ice Islands Quest.