Polemonium Van-bruntiae is a rare spring-flowering plant that is native to North America. It is also known as the Appalachian Jacob's ladder, and it belongs to the Polemoniaceae family. This plant has blue-purple flowers that are similar in appearance to a traditional Jacob's ladder. However, due to its rarity, there are not many synonyms for Polemonium Van-bruntiae. A few alternatives may include Appalachian Jacob's ladder, American Jacob's ladder, American Greek valerian, and Viper's bugloss. Despite being rare, this plant is a beautiful addition to any garden due to its striking appearance and unique characteristics.