Mar'nah at the Sun's Reach Harbor wants you to gather 5 Bloodberries from the bushes found on Quel'Danas.
There are a number of ways I can assist you in your efforts here.
For example, I've recently discovered a recipe for a unique elixir.
The bloodberry grows wild in many regions of Azeroth and has long been considered nothing more than a nuisance. I've learned though, that when exposed to the Sunwell's power this plant takes on special properties that can be distilled and imbibed to magnify one's abilites.
Bring me a sample from the nearby bushes and I'll show you what I mean.