The city of Quito is located at an elevation of 2,800 m, at the base of the Pichincha volcano. The cultivated ornamental plants in Quito, common to almost all of the Andean region, include native species of Ecuador, as well as exotic species coming from different regions of the world. In the guide of trees and ornamental shrubs of Quito 102 species are described including Gymnosperms (11 species) and Angiosperms (91 species). Families and species are sorted and described alphabetically, including scientific name, common names, a brief botanical description, form of reproduction, distribution, ecology, place of origin and other uses (including ornamental.) Most of the species include photographs.