From A Wiki of Ice and Fire
Poison kisses are purple flowers found in the Neck in Westeros. They can cause rashes if they come into contact with skin.
A Game of Thrones
While the retinue of King Robert I Baratheon travels south along the causeway, Arya Stark receives a rash from poison kisses after gathering flowers for her father, Lord Eddard Stark. Mycah tells her that mud will stop the itching.
The Winds of Winter
Poison kisses is spotted in the Rainwood.
- ↑ 1.0 1.1 A Game of Thrones, Chapter 15, Sansa I.
- ↑ Arianne II (The Winds of Winter)