The Red List of US Oaks report details for the first time the distributions, population trends, and threats facing all 91 native oak species in the U.S.

An Urban Tree Canopy (UTC) assessment, which provides a measure of a community’s tree canopy cover, is important for understanding the extent of a community’s forest or tree resource.

Contact your elected representatives and let them know how you feel about plants, our web of life, and the ecosystem services we all depend upon:

The American chestnut, whitebark pine, and several species of ash in the eastern United States are just a few of the North American tree species that have been functionally lost or are in jeopardy of being lost due to outbreaks of pathogens and insect p

The purpose of a Natural Areas Land Management Plan for the Matthaei Botanical Gardens and Nichols Arboretum is to create a forward-focused systematic document that covers the most essential topics for land management.

NYC’s forested natural areas provide important benefits to the city including high-quality recreation, enhanced biodiversity, and improved air and water quality.

This edition (Spring 2011) of the Landscape Management Plan is the result of the continuing work of the Horticulture Department of the Arnold Arboretum.