Necroti busi is one of the less-utilized flowers within the Herblore skill. It is a required ingredient in 4 different potions. It is used to craft Super speed, Super prayer, Dark and Unstable potions, and gives 12 XP when harvested.
You can usually find Necroti busi growing in the sand within the Kharidian Desert, and around Karamja, and sparsely scattered throughout other areas.
There is a patch of Necroti busi just north of Al Kharid bank