Tree catalogs may not match nursery stock and
availability, nor are they necessarily good predictors of tree survival rates. The species that were found to be sold throughout the
112 years include flowering trees, deciduous and evergreen trees,
a palm, but no trees native to Southern California. Thus further
research must be conducted to determine the reasons for new tree
species introductions, their popularity, and whether tree nursery
catalogs are truly good predictors of the biodiversity of trees in the
urban forest. This would link the functional traits that are desired
with the catalog information