The world's flowering plants have long painted landscapes with color, fragrance, and renewal. Yet beneath their familiar beauty lies an evolutionary history stretching back millions of years, a living archive that quietly supports ecosystems, agriculture, medicine, and countless forms of life. Scientists now warn that much of this heritage is facing unprecedented risk if conservation efforts fail to keep pace with accelerating environmental pressures.

An international team of researchers led by the Royal Botanic Gardens, Kew, and the Zoological Society of London conducted the first comprehensive global assessment of extinction risk across the evolutionary tree of flowering plants, known as angiosperms. Their findings, published in the journal Science, estimate that approximately 21.2% of flowering plant evolutionary history is currently at risk of disappearing.

The researchers identified 9,945 Evolutionarily Distinct and Globally Endangered (EDGE) flowering plant species. These species occupy unique branches of the evolutionary tree, meaning their extinction would erase genetic diversity that cannot be replaced by closely related plants. Protecting these species could preserve a substantial portion of threatened evolutionary history while requiring conservation efforts for fewer than 3% of all flowering plant species.

Scientists emphasize that flowering plants are far more than ornamental features of natural landscapes. They provide food, medicines, fibers, timber, and raw materials while supporting pollinators, regulating ecosystems, and sustaining countless animal species. Many also contain chemical compounds that may hold future medical or agricultural value that has yet to be discovered.

According to the study, around one in ten flowering plant species already has at least one documented human use. Researchers caution that losing evolutionarily distinct species could eliminate biological traits and genetic resources that may prove valuable for future scientific discoveries, crop improvement, or pharmaceutical development.

The assessment also highlights an imbalance in global conservation efforts. While mammals, birds, and other animals often receive greater public attention, plants have historically been underrepresented in biodiversity assessments despite forming the ecological foundation upon which many terrestrial ecosystems depend. The new EDGE framework aims to help governments and conservation organizations better prioritize limited resources.

Researchers note that habitat destruction, land conversion, climate change, invasive species, and other human pressures continue to increase extinction risks for flowering plants worldwide. They hope the findings will strengthen international biodiversity planning and encourage earlier conservation action before irreplaceable evolutionary lineages are lost.

The study concludes not with certainty about what will happen, but with clarity about what remains possible. By identifying the most evolutionarily unique flowering plants before they disappear, scientists believe conservation efforts can better safeguard the rich biological heritage that continues to sustain ecosystems and human societies alike.

AI Image Disclaimer: The accompanying illustrations are AI-generated visual interpretations created to support the scientific topic and are not photographs from the original research.

Sources: Science, Royal Botanic Gardens Kew, Zoological Society of London (ZSL), Botanic Gardens Conservation International (BGCI), EurekAlert