Castilla elastica (Nahuatl) word for rubber was "ulli / olli", from which their word for the ballgame derived), and also their name for the ancient people they associated with the origin of the ballgame, the Olmecs ("olmeca": "rubber people"). The Nahuatl word for the tree of "Castilla elastica" is olicuáhuitl; in Spanish it is known as palo de hule. Caucho, castilloa rubber. Castilla elastica Castilla elastica, the Panama rubber tree, is a tree native to the tropical areas of Mexico, Central America, and northern South America. It was the principal source of latex among the Mesoamerican peoples in pre-Columbian times. The latex
Ficus verruculosa Ficus verruculosa Ficus verruculosa, the water fig, is a species of fig from sub-saharan Africa. It is found from north eastern South Africa, northern Botswana and Namibia to Uganda and west to Nigeria in riverine and swamp fringes or grassland, always near water. It is pollinated by the wasp "Platyscapa binghami". The growth form of "Ficus verruculosa" is as a shrub, or weak-stemmed, sparsely branched shrub 0.2-0.6 m tall, less often a small tree up to 12m, often forming low, creeping thickets. Leaves oblong to lanceolate, 3.5-20 x 1.5-8.5 cm, leathery, hairless. Figs are produced mostly in pairs in leaf