Gathering Mementos

I have a task that I can't really trust to anyone else, and I feel you could handle it with the reverence it deserves. An old friend of mine came to me today, bringing a wilted sea stalk flower with her. Her husband was on a ship south east of Freehold. I'm not sure if it was pirates, the Horde, or a squall, but she said she didn't want revenge, just closure. If you could get her something to remember him by, I'll tell you everything I know about sea stalks, and you'd have my gratitude.