Popular species were defined as species that have been offered
consistently every decade in the 110-year study period (Table 3).
The fifteen species offered each decade belonged to nine families
and 13 different genera. Thirteen species were non-native and only
two species were native to California (Sequoia sempervirens and
Sequoiadendron giganteum) both of which grow poorly in Southern California and, despite being offered, are not often found in
the urban fabric. Out of the 15, 13 were evergreen and two were deciduous; nine were angiosperm species and six were gymnosperms; two were palm species.