This is a Rare collection of Flowers.
Items for this collection are found throughout the entirety of the Wilds.
Find Wild Flowers <Rare Collection> and collect it to find an item from the list, below.
The Passion Flower is a reward for completing the Golden Flowers collection.
You can receive the Kudzu as a reward for completing the quest Keep Your Friends Close.... This is an alternative method of obtaining this item; it can also be found from rare flowers.