The Tree Library (TreeLib.ca) is a site for learning about trees mostly in Northern America, Europe and Asia for use by botanical gardens, horticultural schools, universities, researchers and lay people to study trees of the world.

The two main partners on this Flickr site and on the website are Blake C. Willson (dendrologist) and Philippe de Spoelberch (dendrologist), president of the International Dendrology Society in London, UK, who has donated his entire collection of tree photographs taken over 35 years to The Tree Library to make it available to the world. Liberating trees through increasing people's understanding about them.

Blake - The Tree Library