This zone coincides in the same area as the Zoological Garden and it houses more than 500 trees, bushes, palm trees, climbing plants, bromeliads and herbaceous from the tropical and subtropical areas’ species. Spectacular blooming trees such as Gabón’s tulip tree (Spathodea campanulata), the flamboyant (Delonix regia) and orchid tree (Bauhinia variegata), acacias than besides of being ornamental items are also used as fodder for some animals of the Zoo, bougainvilleas and other climbing trees which are in bloom during the whole year and much more plants that catch the attention of the visitors. Little lakes and ponds with aquatic and riverbank plants complete the whole exuberant tropical vegetation.
It should be noted the palmetum, a collection of about 50 palm trees’ species which grow in an area placed between the Tropical and Subtropical plants’ Garden and the Cactus and Succulent Garden. There we can find from small palmettos from the Mediterranean region to the spectacular Bismarck palm tree (Bismarckia nobilis), originally from Madagascar, besides coconut trees, royal palm trees, date palm trees and the ramified fan palms from Hyphaene genus. Among all these species, there are also several species really rare and threatened, such as some Pritchardia from Hawaii Islands.