05_olvwork292698 January 31, 2019January 31, 2019 Matthew Caulkins, Web Applications Program Manager Previous Next Hovenia dulcis. Giant tree. Height 100 ft. Circumference 20 ft. Altitude 4200 ft. Xingshan, Hubei Sheng, China. Photograph by Ernest Henry Wilson. June 15, 1910. Copyright © 2006, 2014 President and Fellows of Harvard College, Arnold Arboretum Archives; all rights reserved.