Marshal Bluewall
Found in Silithus.
Silithus
Item Count Chance 
Stranglekelp1 61.5% 
Sungrass1 31.5% 
Dust of Decay1 23.2% 
Kingsblood1 9.43% Quest Level Side Scouring the Desert 60 Both Quest Level Side Report to Marshal Bluewall 60 Alliance Scouring the Desert 60 Both Zone Spawns Coordinates Silithus 1 33.3, 51.1