A revision on the geobotanical structure of Iran

Based on the data from the Flora of Iran, completed in ۱۸۴ numbers, the geobotanical structure of Iran has been revised. A total of ۱۳۰۴۲۰ specimens were studied for the preparation of the Flora of Iran. The specimens were computerized, and distribution maps were prepared for all taxa, including ۱۷۷ families, ۱۳۰۳ genera, ۷۳۷۱ species, ۶۸۱ subspecies, and ۴۸۶ varieties, of which ۱۹ genera and ۲۳۹۰ (۲۸%) taxa are endemic to Iran. Based on the distribution of taxa, especially endemics, the phytochoria of Iran were recognized. Following the former authors, two kingdoms, including the Holarctic and Paleotropical kingdoms, were recognized in Iran. The Holarctic kingdom includes two regions, the Euro-Siberian and Irano-Turanian Regions. Euro-Siberian consists of the Euxino-Hyrcanian Province and Irano-Turanian, introduced by four provinces, including the Armeno-Atropatanian, Elborzo-Khorasanian, Kurdo-Zagrosian, and Central Iranian. Paleotropical kingdom harbors the lower elevations of the southern part of Iran with a single region and a province, namely the Saharo-Sindian Region and Nubo-Sindian Province. Phytochoria known in this paper are compared with former studies in a table. The most characteristic and or frequent taxa of the phytochoria are mentioned. Also, endemic taxa of the phytochoria are listed. Images of different recognized phytochoria are presented.

کلیدواژه ها:

plant geography ، Iran ، Flora ، endemics ، distribution ، gypsum soil. saline