-

Turcamania, northeastern part of Iran and vest of Afghanistan seems to be center of origin and diversity of Acanthophyllum genus which typically belongs to Irano-Touranian area. Distribution of different species of this genus based on the ratio of the number of species of each place to the number of sections of that genus, and the maximum presence of diploid species in these area and spreading behavior of polyploidy species into the other areas of the world are the basic reasons for this hypothesis . Gathering of endemic species in each area, reproductive isolating mechanism and geographical isolation of this species from other species based on the geological and genetical changes confirm this hypothesis.
Ecological hard differences have beer prevailing different places of Iran has been suitable conditions for evolution and subsequent distribution of this genus.