Balsam poplar Populus balsamifera tree
![](https://lizzieharper.co.uk/wp-content/uploads/2021/06/Balsam-poplar-Populus-balsamifera-tree-287x525.jpg)
Balsam poplar Populus balsamifera tree showing thinner branches due to the krummholz effect on northern trees pen & ink botanical illustration
Illustration from “The Treeline: The last forest and the future of the planet” by Ben Ralence (publ. Jan 2022)