I assume you mean the flowering cactoid hunt. Anyway, if you go back and talk to the guy that posted the bill for the hunt, Dantro (at Outpost in the Estersand), he'll ask you to take the flower to his wife. Go north until you reach a village (Still in the Estersand). Dantro's Wife is standing outside a house in the Northeastern section of the village. If you talk to her, her name will be shown as "Dantro's Wife". She'll take the flower and ask you to get some more things as part of the sidequest.