Hackberry: Very Small Persons’ Climbing Wall The Hackberry tree (Celtis occidentalis) is also known as sugarberry, beaverwood, nettetree, or false elm.  The spreading canopy of the Hackberry has been compared to Einstein’s hair.  It derives its name from the Scottish “hag” (witch) or hagberry tree, and some refer to the drooping bushy branches as “witches’ … Continue reading Hackberry: Very Small Persons’ Climbing Wall