Atriplex are C-plants, with a characteristic leaf anatomy (kranz anatomy). The genus "Atriplex" is distributed nearly worldwide from subtropical to temperate and to subarctic regions. Most species-rich are Australia, North America, South America and Eurasia. Many species are halophytes and are adapted to dry environments with salty soils. The genus evolved in Middle Miocene, the C-photosynthesis pathway developed about 14.1-10.9 million years ago, when the climate became increasingly dry. The genus diversified rapidly and spread over the continents. The C"Atriplex" colonized North America probably from Eurasia during the Middle/Late Miocene, about 9.8-8.8 million years ago, and later spread to South America.
Growing region Growing region A growing region is an area suited by climate and soil conditions to the cultivation of a certain type of crop or plant group. Most crops are cultivated not in one place only, but in several distinct regions in diverse parts of the world. Cultivation in these areas may be enabled by a large-scale regional climate, or by a unique microclimate. Growing regions, because of the need for climate consistency, are usually oriented along a general latitude, and in the United States these are often called "belts". The growing region of a traditional staple crop often has a