Written by French botanists who explored North American forests in the late 1700s, The North American Sylva is a monumental work with masterful illustrations and extensive botanic profiles. The book would help France reforest its post-war countryside, and become a landmark in North American forestry. Today, it remains readable and interesting—certainly a work of evergreen value.
Matt Ritter, the author of A Californian's Guide to the Trees Among Us, and a botany professor, talks about the difference between the cultivated and invasive trees, which trees are taking over California, and why poor neighborhoods seem to have fewer types of trees.
Ever wish there was a Shazam for trees? LeafSnap is a new mobile app that can identify a tree's species by looking at a photograph of its leaf. It's a field guide for the twenty-first century, which uses facial recognition algorithms to analyze the leaf's contour so it can find a match from its index of species.