Native Plant Species

A native plant belongs to the natural flora of a region; an endemic plant has a distribution restricted to a specified area. The distinction matters in Iran, where some familiar native species also grow naturally across national borders. Persian ironwood, Parrotia persica, offers a clear example. Kew records its native range from southeastern Azerbaijan to northern Iran, so describing it as exclusively Iranian would misrepresent its geography. s1s2

Kew recognizes Persian ironwood as an accepted tree species associated primarily with the temperate biome. Its botanical identity and distribution provide a firmer introduction than its English name alone. A name containing 'Persian' does not establish national endemism, just as cultivation in an overseas garden does not extend a species' native range. s2

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Iran lies across major botanical regions rather than within one uniform vegetation zone. A national synthesis published in Scientific Reports distinguishes the Irano-Turanian region, the Euro-Siberian region and the Saharo-Sindian region. These are regions defined by plant geography, not administrative provinces. Their meeting helps explain why a national plant list includes species associated with very different environments. s1

The same study emphasizes mountain ranges as centres of endemism. Elevation, topographic complexity and varied local environments help explain the concentration of geographically restricted plants. Its account identifies Astragalus, a legume genus, and Cousinia, a genus in the daisy family, as particularly important contributors to endemic diversity. Iran's botanical richness therefore cannot be understood through forest trees alone: less conspicuous mountain and open-land plants are central to the story. s1

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Knowing that a species occurs in Iran is only the beginning of a conservation assessment. Researchers must also examine its geographic distribution and whether important concentrations fall within protected areas. A study published in Ecology and Evolution in 2025 applied International Union for Conservation of Nature criteria to Iran's endemic vascular plants and investigated gaps in protection. Vascular plants include flowering plants and other groups with specialized tissues for moving water and nutrients. s3

The assessment found a high proportion of threatened species and identified mountain areas where concentrations of threatened plants were insufficiently covered by protected areas. These are findings of the authors' assessment using IUCN methods. They should not be described as proof that every species received a separately published assessment in the global IUCN Red List database. s3

The study's use of geographic-range criteria also matters. A narrowly distributed plant may face substantial risk even when there is no long annual census of its abundance. Conversely, an assigned threat category is not a direct measurement of how many individual plants disappeared in a particular year. s3

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Botanical inventories depend on their scope and taxonomic decisions. The 2019 synthesis included endemic and subendemic plants, the latter extending slightly beyond Iran; the 2025 assessment excluded subendemics. Those populations of species are not interchangeable. Comparing their headline totals as if they were successive national censuses would create a misleading trend. s1s3

For readers, the most useful questions are therefore precise ones: is the plant native or endemic, which geographic area defines that statement, and what evidence supports its conservation status? Those distinctions turn an impressive plant list into an explanation of Iran's living landscapes. s1s2s3

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