Iran is a
country of southwest Asia (Middle- East).
Average latitude of Iran is 32 ° N , from 40th to 25th parallel, longitude from
38th to 50th meridian, area 1.648.195 km².
including three phytogeographic regional parts: Mediterranean, Irano Turanian ( Aralo-Caspian), and saharo india zones. Phytogeographic central
Asian and Euro Siberian zones arise too. However ,
despite a non important vegetal cover in Iran, the
confluence of these five phytogeographic zones
in its territory procures for itself a rich diversity: height
thousands species of plants, of which about 2500 endemic ( that is,
limited to it’s regions as spontaneous state). Over a thousand of these plants
are some of rare species.
In order to illustrate what has
just been said, in France
are recorded 4500 species where 3500 are present in the
Mediterranean area.(2800 in Corsica).
Some of it’s regions
have a Mediterranean climate or sub-humid climate, and
deeper into arid areas with low and erratic rainfall. Almost
one million and two thousands km² is made up
of arid and desert lands. There is a real contrast between arid enclosed waters regions, and rain secure marginal
regions, made up of mostly by high mountain ranges. Such a
structure inevitably leads to saline lakes formation, which when
dried, change into salt deserts.