Wildlife of Chile Nacional Cabo de Hornos." The country's flora is composed of "56 orders, 181 families, 837 genera, and about 4,295 species" with large numbers in terms of genera and species from the families Asteraceae, Poaceae, Fabaceae, and Solanaceae. The land is divided into latitudes sections which dictate the country's vegetation; the soil conditions of the lands and the climatic conditions are key factors in this respect. In the northern desert region (Atacama Desert, the driest place on Earth) which is the desert region of sand there is no precipitation at all but it still sustains not only vegetation but also fauna;
Sahara Desert (ecoregion) that crosses the ecoregion is the Nile River, which originates in central Africa and empties northwards into the Mediterranean Sea. Some areas encompass vast underground aquifers resulting in oases, while other regions severely lack water reserves. The Sahara Desert features a hot desert climate (Köppen climate classification "BWh"). The Sahara Desert is one of the driest and hottest regions of the world, with a mean temperature sometimes over and the average high temperatures in summer are over for months at a time, and can even soar to . In desert rocky mountains such as the Tibesti in Libya or the