Arboretum Tree & Shrub Data

The Institute of Museum and Library Services (IMLS) awarded funds for a one-year project to map and assess the condition of the trees and shrubs in the historic landscape areas of the Nichols Arboretum. The purpose is to provide base-line data to evaluate the extent, complexity, and health of the historic woody plant collections at the Nichols Arboretum. Please note this project does not include all woody plants; rather it is the base-line to build a consistent and rich data resource. The Davey Tree Expert company was hired in 2016 to conduct the survey and health assessment of historic woody collections over 4” / 10 cm in diameter. In addition, two UM SNRE graduate students, Jared Aslakson and Zac Millebrand, were hired to map the shrubs in the historic collection zones.

6,310 plants were captured. Most of the data points are of single plants, but in cases of close-growing masses of the same species, the group’s center is captured and the point noted as a group. In the maps below, data from additional projects is also included.

The data is being prepared for publication in the UM’s Enterprise ArcGIS environment so that any qualified user can discover and download the data itself. If you would like access at this point, please contact David Michener at:

In the sample maps below, the Arboretum’s base map is keyed as “Surveyed”, “Partially Surveyed”, and “Not Surveyed”. These levels of completion reflect the purpose of the IMLS project: the historic landscape collection areas of the Nichols Arboretum. Several exotic woody species were specifically excluded, as they are being removed under our management practices.