Pakistan’s Hidden Plant Treasures: 940 Endemic Species Mapped in Landmark Review

Pakistan has long been celebrated for its towering mountain ranges, from the snow-crowned Karakoram to the rugged Hindu Kush and western Himalaya, but the full extent of its unique plant life has remained surprisingly poorly documented. A new review published in Plant Biosystems has now compiled the most comprehensive inventory to date of the country’s endemic and sub-endemic flora, identifying 940 taxa that grow nowhere else on Earth, or almost nowhere else. Drawing on more than five decades of published research spanning 1970 to 2026, the study offers the first unified picture of how many of these botanical treasures exist, where they live, and how vulnerable they may be to the mounting pressures of climate change and human activity.

The research team, led by Gul Nawaz and Zaheer Abbas with collaborators from Poland and the United States, distinguished between strict endemics, meaning species restricted entirely to Pakistan, and sub-endemics, whose ranges spill only marginally into neighboring territories. Of the 940 taxa catalogued, 382 qualify as strict endemics while 558 are sub-endemic. Together they span 65 plant families and 290 genera, a level of diversity that places Pakistan firmly among the regionally significant centers of plant endemism in Asia. The inventory was assembled through an exhaustive literature review and careful taxonomic analysis, reconciling names that have shifted repeatedly as molecular phylogenies have reshaped plant classification in recent decades.

The taxonomic breakdown reveals a flora overwhelmingly dominated by flowering plants. Dicots account for 867 of the catalogued taxa, while monocots contribute 72 and gymnosperms just a single representative. The sunflower family, Asteraceae, emerges as the most species-rich family among Pakistan’s endemics, followed by the legumes of Fabaceae and the umbellifers of Apiaceae. At the genus level, two names stand out: Astragalus, the enormous milkvetch genus that radiates spectacularly across the arid mountains of Central Asia, and Taraxacum, the dandelions, whose apomictic reproduction, producing seeds without fertilization, generates bewildering arrays of narrowly localized forms. Both genera are classic examples of rapid mountain diversification, and Pakistan’s dry alpine zones appear to be a particular cradle for their evolution.

Ecologically, the endemic flora is dominated by perennial herbs, a growth habit that makes sense in the context of the environments where most of these species occur. Perennial herbs in high mountain systems invest in persistent rootstocks and cushion or rosette forms that survive harsh winters, intense ultraviolet radiation, and short growing seasons. This life-form profile mirrors patterns documented elsewhere along Himalayan and Central Asian elevational gradients, where woody plants give way to herbaceous specialists as altitude increases. The prevalence of perennial herbs also carries conservation implications: such plants often have small, fragmented populations, limited dispersal capacity, and slow recovery from disturbance, all traits that elevate extinction risk when habitats degrade.

Perhaps the most striking finding concerns elevation. Endemic species occurrence peaks sharply between 2,901 and 3,000 meters above sea level, a narrow altitudinal band in the subalpine zone. This pattern aligns with a growing global body of evidence that endemism increases with elevation, driven by the way topography isolates populations on individual massifs and valley systems. Mountain ridges act as evolutionary islands: populations separated by deep valleys and glaciated passes diverge over time, eventually becoming distinct species confined to single slopes or basins. In Pakistan, where three of the world’s great mountain systems converge, this topography-driven speciation has operated at exceptional intensity, producing clusters of narrow endemics in places like Gilgit-Baltistan, Chitral, and Swat.

The phytogeographic analysis adds another layer of insight by assigning each taxon to a regional floristic domain. Nearly half of the strict endemics, 48.43 percent, show their strongest affinities with the Sino-Japanese region, reflecting the eastward extension of Himalayan floral elements into Pakistan’s northern mountains. Sub-endemics, by contrast, are most strongly tied to the Central Asian region, accounting for 39.43 percent, a signature of the Irano-Turanian steppe flora that blankets the arid interior ranges of Balochistan and the western mountains. This dual heritage makes Pakistan a genuine biogeographic crossroads, where the humid, monsoon-influenced flora of the eastern Himalaya meets the drought-adapted flora of Inner Asia. The contact zone between these two great floristic realms is precisely where many of the country’s most distinctive plants have arisen.

Why does this matter beyond the borders of one country? Endemic species are, by definition, irreplaceable. If a plant exists only on a single mountain in northern Pakistan, its loss would mean its total disappearance from the planet. Globally, endemism is one of the strongest criteria used to designate biodiversity hotspots, and regions rich in narrow endemics tend to be disproportionately vulnerable because their species typically have small ranges, specialized habitat requirements, and low genetic diversity. The new inventory therefore functions as a baseline against which conservation priorities can be measured. Previous assessments of Pakistan’s red-listed plants have been piecemeal, often focused on individual species such as the critically endangered Androsace russellii of Gilgit or the narrow endemic Astragalus clarkeanus of Gilgit-Baltistan. A unified national inventory allows conservation planners to identify which mountain systems harbor the greatest concentrations of irreplaceable flora and to target protection accordingly.

The threats facing this flora are neither hypothetical nor distant. Pakistan is consistently ranked among the countries most exposed to climate change, with accelerating glacial retreat in the Karakoram and Himalaya altering the hydrology and temperature regimes of high-altitude habitats. At the same time, population growth, overgrazing, deforestation, unsustainable harvesting of medicinal plants, and infrastructure expansion are fragmenting habitats across the country’s mountain valleys. Many of the endemic species documented in the review are known from only a handful of collections, and some have not been recorded in decades, leaving their current status uncertain. The authors emphasize that natural and anthropogenic pressures are increasing simultaneously, making the documentation of geographically restricted taxa an urgent task rather than an academic exercise.

The study also highlights how much taxonomic work remains to be done. Recent years have seen a remarkable wave of new species descriptions from Pakistan, particularly in the genus Astragalus, with new species described from Zhob and northern Balochistan, alongside new finds in genera such as Nepeta, Tragopogon, Oxytropis, and Allium. Each discovery suggests that the true number of endemics is likely higher than the current count of 940. Ongoing revisions of difficult groups, aided by molecular systematics and morphological re-examination of herbarium material, continue to split broadly defined species into narrower, locally endemic ones. This dynamic state of knowledge means that inventories like this one must be treated as living documents, updated as exploration extends into under-collected regions such as the remote valleys of Balochistan and the high passes of the Karakoram.

For the international scientific community, the review provides something equally valuable: a testable framework for understanding global biogeographic patterns. Pakistan sits at the junction of several of the world’s major floristic regions, and its endemic flora records the history of migration, isolation, and adaptation that shaped plant diversity across the whole Himalayan-Central Asian arc. By documenting exactly which lineages dominate the endemic flora, which elevations concentrate it, and which phytogeographic regions feed it, the study offers comparative data for researchers working from the Alps to the Andes. As the authors note, safeguarding this regional biodiversity is not merely a national responsibility but a contribution to the global effort to preserve the evolutionary heritage of mountain ecosystems, some of the most species-rich and most threatened environments on Earth.

Subject of Research: Taxonomy, distribution and ecology of endemic vascular plants in Pakistan

Article Title: Endemism in the flora of Pakistan: a review of the taxonomy, distribution and ecology

Article References: Endemism in the flora of Pakistan: a review of the taxonomy, distribution and ecology. (n.d.). https://doi.org/10.1007/s44473-026-00302-6

Image Credits: AI Generated

DOI: 10.1007/s44473-026-00302-6

Keywords: endemism, Pakistan, flora, Asteraceae, Astragalus, biodiversity hotspots, phytogeography, Himalaya, Karakoram, plant conservation, elevational gradient, taxonomy