Herbalist's Tasks (Act 1)

Acquisition
Talk to Solivitus in the Gallows, whom will offer a quest in which you are tasked with gathering several resources for him. This quest if offered in both Chapter 1 and 2, with different resources to find.

Walkthrough
The resources that Solivitus wants are scattered in and around Sundermount and The Wounded Coast. The resources needed in Act 1 quest are as follows:


 * Spider Silk Gland - Drops off of spiders in the Ruined Passage during the quest Magistrate's Orders
 * Dragon Fang - Looted from the final boss in the quest Bone Pit.
 * Ironwood Bark - Speak to Master Ilen in the Dalish camp in Sundermount to get directions.

The resources needed in Act 2 quest are as follows:


 * Dalish Tattoo Ink - Found in a chest in the Dalish camp in Sundermount
 * Harlot's Blush - Found in the northwest of The Wounded Coast near Magus Tavarin Hall and Cave entrance.
 * Varterral's Heart - Found in Sundermount during the companions side quest Mirror Image.

Rewards
1st quest - 3 sovereign

2nd quest - 3 sovereign

Dragon necklace
There's also a necklace you can get made when you kill the High Dragon and loot its corpse at the Bone Pit in act 3. This quest should activate after you slay the High Dragon and take its fire gland. The quest will tell you take the gland back to the mage at the Gallows, where he will craft the item.