Toxxilac

In the Tenebrous Tangle, it's a purple flower with a red stalk, and when I had the quest, Restocking Supplies: Toxxilac, given by Surgeon Kweei in the Hidden Refuge(just follow the river and fall of the island following the waterfall and you'll land in the pond), in my journal, they dotted the ground right after you pass through the arch right after the druid portal and along the river.