Ficus elastica prefers bright sunlight but not hot temperatures. It has a high tolerance for drought, but prefers humidity and thrives in wet, tropical conditions. Ornamental hybrids (such as Robusta) have been derived from "Ficus elastica" with broader, stiffer and more upright leaves than the wild form. Many such hybrids exist, often with variegated leaves. "Ficus elastica" yields a milky white latex, a chemical compound separate from its sap and carried and stored in different cells. This latex was formerly used to make rubber, but it should not be confused with the Pará rubber tree, the main commercial source of latex for
Ficus vasta not cultivated under domestication, and is disappearing due to human pressure, mainly in its use as firewood. Ficus vasta Ficus vasta (; warka) is a fig plant found in Ethiopia and Yemen. "Ficus vasta" is a large tree, with a massive trunk, and spreading branches whose tips form an inverted bowl up to 50m in diameter. It reaches a height of 25m. The trunk is smooth and grey, and is commonly buttressed. The bark is smooth and grey, except on young branches where it is yellow-white-brown, and flaking when dry. The leaves are elliptical, reaching 25 x 20 cm, hairy,