The following sources were used to collect the attributes listed. Final determination was made by Jason Veil, Secrest Curator.
Websites:
Morton Arboretum: https://mortonarb.org/plant-and-protect/search-trees-and-plants/
Missouri Botanical Gardens: https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderSearch.aspx
United States Department of Agriculture: https://plants.usda.gov/home/plantProfile
North Carolina State Extension: https://plants.ces.ncsu.edu/find_a_plant/
Royal Horticultural Society: https://www.rhs.org.uk/plants/
Great Plant Picks: https://www.greatplantpicks.org/
Chicago Botanic Garden: https://www.chicagobotanic.org/
Books:
Dirr, Michael A. Dirr’s Hardy Trees and Shrubs. Portland, OR: Timber Press, 1997
People:
Secrest Arboretum Staff