Table 4.

Percentage of agreement between certified arborists’ and volunteers’ tree identification. Levels of agreement as to the genus of sample trees were high between volunteers and certified arborists. Agreement levels decreased when genus and species were examined.

Tree typeGenusGenus & species
Acer95%90%
Fraxinus96%68%
Quercus93%70%
Platanus92%46%
Gleditsia96%96%
Tilia91%73%