Endangered ‘Extinctus’ Wildflower Rediscovered in South America

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Plant extinctions are accelerating at a rate the natural world has not seen for millions of years. A 2024 study published in ScienceDirect found the current plant extinction rate is as much as 500 times higher than the natural background rate before the Anthropocene era began.

Against this sobering backdrop, the rediscovery of the lost South American wildflower named extinctus, known scientifically as Gasteranthus extinctus, feels almost miraculous. A team of ten botanists from six institutions across Ecuador, the United States, and France confirmed its survival in 2021. Their findings appeared in the peer-reviewed journal PhytoKeys in April 2022.

What Is the ‘Extinctus’ Wildflower

1. Scientific Name and Botanical Classification

Gasteranthus extinctus belongs to the family Gesneriaceae (a large tropical plant family that includes popular ornamentals like the African violet). It is one of 26 species of the genus Gasteranthus found in western Ecuador alone. The genus name Gasteranthus comes from the Greek words for “belly” and “flower,” describing the distinctive shape of its blooms.

The species was formally described and named in 2000 by botanists L.E. Skog and L.P. Kvist, based on four herbarium collections made between 1977 and 1985 at Centinela Ridge.

Its specific epithet, extinctus, was chosen deliberately as a warning signal. The scientists who named it believed the species had already been wiped out by the time they were writing its scientific description.

2. Physical Characteristics of the Plant

Gasteranthus extinctus is a small, low-growing herb that lives on the shaded forest floor. It produces uniformly bright neon-orange flowers that stand out sharply against the dark understory of cloud forests.

The flowers have a distinctive belly-shaped pouch on the underside with a narrow opening at the top, which allows pollinators to enter and exit while feeding on nectar.

• The plant is a terrestrial herb, meaning it grows in soil on the forest floor rather than as an epiphyte (a plant that grows on other plants without taking nutrients from them).
• Its bright orange color and pouch-shaped flowers make it visually distinctive among the forest understory, even to untrained eyes.
• The flowers have small, bristle-like hairs on their exterior, a characteristic that helped field botanists make a preliminary identification during the 2021 expedition.
• While the specific pollinator for G. extinctus has not been confirmed, other Gasteranthus species are pollinated by insects and hummingbirds, which are capable of navigating the narrow flower opening.

3. Why It Was Given the Name “Extinctus”

Scientific names are legally binding in biology and are governed by the International Code of Nomenclature. When Skog and Kvist named this species in 2000, they knew it had been collected from Centinela Ridge in Ecuador, a site that had been almost entirely deforested through the 1980s and 1990s. Naming it extinctus was their way of documenting the ecological catastrophe they believed had already claimed it.

As Dawson White, postdoctoral researcher at Chicago’s Field Museum and co-lead author of the 2022 PhytoKeys paper, explained: “Extinctus was given its striking name in light of the extensive deforestation in western Ecuador.

But if you claim something’s gone, then no one is really going to go out and look for it anymore.” The plant will keep the name extinctus, because the International Code of Nomenclature has strict rules about renaming species, and a rediscovery does not meet the criteria for a name change.

4. Historical Records of the Species

All four original collections of G. extinctus were made in cloud forests at Centinela between 1977 and 1985. These collections were preserved as herbarium specimens, dried and pressed plant samples stored in botanical institutions.

After 1985, no further confirmed sightings were recorded for nearly four decades. Scientists working in tropical botany knew the species existed in herbaria, but had no evidence it still existed in the wild.

White et al. (PhytoKeys, 2022) reported that G. extinctus was recorded at five separate sites in the western foothills of the Ecuadorian Andes, located between 4 and 25 km from the original type locality at Centinela Ridge, during 2019 and 2021 field surveys.

Multiple-site confirmation is critical in conservation biology because a single-population rediscovery carries an extremely high extinction risk from a single disturbance event such as a landslide, fire, or disease outbreak.

How the Wildflower Was Thought to Be Lost

1. Last Confirmed Sightings Before Rediscovery

The last herbarium specimen of Gasteranthus extinctus was collected in 1985 from Centinela Ridge, a site in the western foothills of the Ecuadorian Andes near the city of Santo Domingo.

After that year, no botanist formally documented the plant alive in the field. That silence lasted nearly 40 years, long enough for two generations of conservation scientists to accept it as a casualty of deforestation.

Since 2009, several scientists mounted expeditions specifically to search for G. extinctus. None of those searches succeeded. The failed expeditions reinforced the assumption that the species was gone, which in turn reduced the urgency for further searching.

2. Why Scientists Believed It Had Disappeared

The reason scientists wrote off G. extinctus was deeply tied to the fate of Centinela Ridge itself. This forested ridge became notorious in conservation biology after biologist E.O. Wilson described the loss of its unique flora in the 1980s.

He coined the term Centinelan extinction (the instant disappearance of species when a small, isolated habitat is completely destroyed) based on what happened here.

1. The forests of western Ecuador were almost entirely cleared by the end of the 20th century. As of data compiled by the Monitoring of the Andean Amazon Project (MAAP), over 97% of forests in western Ecuador had been converted to farmland, leaving only scattered forest fragments behind.

2. The original Centinela Ridge site, a 600-meter-tall forested ridge that served as the only known location for G. extinctus, was completely cleared of its cloud forest cover, removing all known habitat for the species.

3. With no surviving habitat at the only known location, and no successful searches in over a decade, the scientific consensus shifted toward treating the species as extinct in the wild.

3. Challenges in Locating the Species

Even scientists who suspected G. extinctus might have survived faced severe logistical obstacles. Most satellite imagery of the western Andean foothills is heavily obscured by cloud cover, making it difficult to identify intact forest patches from above. Ground surveys require traversing steep ravines and private land.

The plant grows on the forest floor and does not stand out from aerial imagery. Without funding and a targeted expedition, the search was simply not happening. The plant’s presumed extinction also created a self-reinforcing problem: no one expected to find it, so no one looked hard enough.

The Rediscovery in South America

1. Where the Plant Was Found

Gasteranthus extinctus was found alive in the foothills of the Andes mountains in western Ecuador, in remnant patches of cloud forest scattered across Los Ríos province.

One confirmed population was growing next to a waterfall at Bosque y Cascada Las Rocas, a private reserve in coastal Ecuador. The rediscovery sites are located between 4 and 25 km from the original Centinela Ridge type locality, indicating the species had persisted outside its known range without anyone realizing it.

2. Who Discovered It

The rediscovery was the result of a targeted scientific expedition funded by the Field Museum’s Women’s Board in Chicago. The expedition was co-led by Dawson White, a postdoctoral researcher at the Field Museum, and Nigel Pitman, a tropical botanist also affiliated with the Field Museum.

The team brought together ten botanists from six institutions across Ecuador, the United States, and France, including Juan Guevara, Thomas Couvreur, Nicolás Zapata, Xavier Cornejo, and Gonzalo Rivas.

3. Details of the Field Expedition

Planning began in the summer of 2021, when White and Pitman spent months combing through satellite imagery to identify surviving patches of primary rainforest in the region.

The imagery analysis was difficult because cloud cover obscured most aerial views of the target area. After identifying candidate sites, the team assembled and traveled to Ecuador in November 2021.

When the team arrived on the ground at Centinela, they immediately found remnants of intact cloud forest. G. extinctus was spotted on the first day, within the first few hours of searching.

The team recognized it by its distinctive belly-shaped orange flowers and bristly hairs, even without a color photograph to compare it to, using only herbarium specimens, a line drawing, and a written botanical description as reference.

They collected fallen flowers carefully to avoid harming the plant, then sent photographs to taxonomic expert John Clark for confirmation. Clark verified the identification.

“We walked into Centinela thinking it was going to break our heart, and instead we ended up falling in love,” said Pitman. After the initial find, the team visited other forest fragments and found many more individuals.

They also validated unidentified photographs posted on the community science platform iNaturalist as G. extinctus, adding a citizen-science dimension to the rediscovery.

4. Number of Specimens and Populations Identified

The formal PhytoKeys paper documents confirmed records from five separate sites in the western Andean foothills, based on surveys conducted in 2019 and 2021.

The existence of multiple populations, while still small and isolated, was considered a hopeful sign for the species’ short-term survival. Each population occupies a fragment of remaining cloud forest, separated by agricultural land.

The Natural History Museum (UK, 2022) noted that at least 90 species are found only in Centinela Ridge, and that six species of Gasteranthus alone, roughly one-fifth of the world’s total known Gasteranthus species, were discovered on this single ridge.

When a small geographic area holds this level of plant endemism (species found nowhere else on Earth), even partial habitat loss translates directly into global species loss.

Habitat and Natural Range: Where Gasteranthus extinctus Lives

1. Geographic Distribution

Gasteranthus extinctus is known only from a narrow band of western Andean foothills in Los Ríos province, western Ecuador. Its confirmed range is extremely limited.

All known populations sit within a few dozen kilometers of Centinela Ridge, making it a highly range-restricted endemic species. An endemic species is one that exists naturally in only one defined geographic region and nowhere else on Earth.

2. Ecosystem and Environmental Conditions

The plant lives in moist montane cloud forest, a forest type found at elevations where persistent cloud and mist maintain extremely high humidity year-round.

Cloud forests are among the most biodiverse ecosystems on the planet per unit area, supporting thousands of plant, insect, amphibian, and bird species. G. extinctus specifically occupies the shaded forest floor, where it receives indirect light filtered through the forest canopy.

The Centinela Ridge region historically experienced high rainfall, which contributed to the extraordinary density of endemic species. That same moisture-rich environment also made the land attractive for agricultural conversion, particularly for banana and palm oil plantations that require similar climatic conditions.

3. Associated Plant and Animal Species

G. extinctus shares its habitat with a remarkable community of other endemic Centinelan species, many of which are also poorly known or threatened. The region belongs to the broader Chocó-Darién biodiversity hotspot, one of the most species-rich areas in the western hemisphere.

The MAAP analysis estimated that 20% of species in northwest Ecuador are endemic to the region, meaning a fraction of remaining forest holds an outsized share of irreplaceable biodiversity.

Pollinators such as hummingbirds and insects are critical for the plant’s reproduction. The loss of these animal species through habitat fragmentation would undermine the plant’s ability to set seed and maintain populations even in protected areas.

4. Importance of the Habitat for Survival

The tiny forest fragments where G. extinctus now survives are the last remnants of a once-continuous cloud forest. These fragments are not formally protected in most cases.

They exist on private land, in steep ravines, or in patches too small to attract formal conservation attention. The plant’s survival depends entirely on whether these micro-habitats remain undisturbed long enough for conservation measures to take hold.

Why the Species Remains Endangered

1. Habitat Destruction and Agricultural Expansion

Western Ecuador is one of the most heavily deforested regions in South America. A 2024 Mongabay analysis using satellite data found that Ecuador lost 1.16 million hectares of natural land cover between 1985 and 2022.

Agriculture has taken over large swaths of what was once cloud forest, driven by expansion of banana plantations, oil palm, pasture land, and subsistence farming.

The remaining forest patches where G. extinctus survives are surrounded by this agricultural matrix. Each fragment is effectively an island of forest in a sea of crops. As the surrounding agricultural land expands, these islands shrink, fragment further, and become increasingly isolated from each other.

2. Climate Change Impacts

Cloud forests depend on precise climatic conditions, particularly consistent cloud immersion and temperature ranges. Climate change is shifting precipitation patterns and cloud base elevations across the Andes.

A warming climate pushes the cloud base higher up the mountain slopes, effectively removing the cloud from lower-elevation cloud forests. Species like G. extinctus, which are adapted to the moisture regime of a specific elevation band, cannot simply migrate upward if suitable forest does not exist there.

3. Small Population Size Concerns

Even with five confirmed sites, the total known population of G. extinctus is very small. Small populations face an additional biological threat called genetic erosion, the loss of genetic diversity that occurs when a breeding population drops below a viable size.

Reduced genetic diversity makes a species less capable of adapting to new diseases, pests, or environmental stressors. It also increases the risk of inbreeding, which further reduces reproductive fitness.

• Isolated forest fragments limit the movement of pollinators between populations, reducing cross-pollination and gene flow between sites.
• A single catastrophic event such as a landslide, wildfire, or disease outbreak could eliminate an entire known population, reducing the total number of sites from five to four or fewer.
• The species was reclassified as Critically Endangered on the IUCN Red List following its rediscovery, the highest threat category short of extinction in the wild.

4. Human Activities Threatening the Population

Beyond agriculture, logging, illegal extraction, and road development all pose ongoing threats to the small forest remnants where the plant survives. Ecuador ranks among the top three countries in the world by number of threatened species, according to Statista’s 2025 data, with roughly three-quarters of threatened species in Ecuador being plants.

The 2025 Rainforest Foundation report also flagged a new legal concern: Ecuador’s National Assembly approved a protected areas law that environmental groups say opens conservation zones to private and foreign companies, potentially weakening protections for small forest fragments that currently harbor species like G. extinctus.

The Monitoring of the Andean Amazon Project (MAAP) found that 61% of Ecuador’s Chocó region, totalling 1.8 million hectares, has been deforested, with one-fifth of that loss occurring between 2000 and 2018 alone.

Even protected areas within this zone have not been spared: only 61% of the Mache-Chindul Ecological Reserve retains its original forest cover, highlighting the limits of legal protection without active enforcement.

Scientific Importance of the Rediscovery

1. What Researchers Learned From Finding the Species

The rediscovery of Gasteranthus extinctus provided researchers with fresh plant material for the first time in nearly 40 years. The 2021 expedition team collected leaves for DNA analysis, which allows scientists to characterize the plant’s genetic makeup, understand its evolutionary relationships within the Gesneriaceae family, and assess the genetic diversity of surviving populations. This molecular data did not exist before the rediscovery.

Scientists also gathered museum-standard herbarium voucher specimens to formally document the rediscovery and update the species’ taxonomic record. These specimens enter permanent collections where they remain accessible to researchers for generations.

2. Contribution to Biodiversity Knowledge

The rediscovery forces a re-examination of the concept of Centinelan extinction itself. The original narrative held that species from Centinela were gone because the forest was gone.

Gasteranthus extinctus demonstrates that some species from highly degraded landscapes persist in tiny, overlooked fragments. This matters because it shows that even heavily disturbed regions retain conservation value and should not be written off.

“Finding G. extinctus was great, but what we’re even more excited about is finding some spectacular forest in a place where scientists had feared everything was gone,” said Pitman. The expedition documented not just the target species but a broader array of Centinelan plant diversity surviving in fragments that had not been surveyed before.

3. Implications for Botanical Conservation

A 2024 study in ScienceDirect found that recently described plants have an extinction rate twice as high as those described before 1900, with 75% of undescribed species already at risk.

Rediscovering this flower shows that it’s not too late to turn around even the worst-case biodiversity scenarios, and it shows that there’s value in conserving even the smallest, most degraded areas.

The case of G. extinctus complicates this picture: a plant assumed extinct because it was named after its forest was destroyed turned out to be alive.

This suggests that premature extinction assessments based on habitat loss alone, without field verification, may overestimate true extinction rates in some cases.

4. Lessons for Other “Lost” Species Searches

The G. extinctus case provides a practical framework for finding other lost plant species:

1. Use satellite imagery to identify surviving forest fragments in areas where target species were historically collected, even if the fragments appear small or degraded.
2. Assemble multidisciplinary teams with specialists in the target genus or family, ensuring identification can be made in the field from incomplete reference material.
3. Engage community science platforms like iNaturalist to crowdsource photographic records, since citizen scientists operating in remote areas may already have photographed species that taxonomists have not yet identified.
4. Collect genetic material alongside morphological vouchers to enable population-level genetic analyses that were not possible when older collections were made.
5. Publish findings rapidly and with full geographic detail to enable concurrent conservation action before rediscovery locations become known to land developers or collectors.

Conservation Efforts Underway

1. Protection Measures Being Implemented

Following the 2022 publication, the research team began working directly with Ecuadorian conservationists to protect the forest fragments where G. extinctus and other Centinelan species survive.

The immediate priority is preventing further clearing of private land that contains known populations. This involves negotiating conservation agreements with landowners, many of whom are small-scale farmers who depend on the land for their livelihoods.

2. Involvement of Conservation Organizations

The Field Museum, through its Environment, Culture, and Conservation division, is coordinating with Ecuadorian partner organizations on site-level protection.

The broader context includes Ecuador’s protected area network, though as noted earlier, new legislation has raised concerns among conservationists about the long-term security of that network.

International botanical institutions with ties to Gesneriaceae research, including the Smithsonian National Museum of Natural History, which covered the rediscovery through its Plant Press publication, are also following the case.

3. Seed Banking and Propagation Programs

The collection of herbarium specimens and leaf material in 2021 represents the first step toward ex-situ conservation, preserving living genetic material outside the plant’s natural habitat. Ex-situ conservation (conservation of species outside their native habitat, such as in botanical gardens or seed banks) serves as a safety net in case wild populations collapse.

Seed banking for cloud forest species is technically challenging because many tropical seeds do not tolerate the drying and cold storage used in orthodox seed banks. Specialized protocols or cryopreservation of living tissue may be required for G. extinctus.

4. Monitoring and Future Research Plans

The PhytoKeys paper includes explicit recommendations for future research, including systematic surveys of additional forest fragments in the region, population size estimates for each known site, pollinator identification studies, and long-term demographic monitoring. Monitoring requires sustained funding and local researcher capacity, both of which remain limited in western Ecuador.

Challenges for Long-Term Survival

1. Ongoing Threats and Funding Limitations

Rediscovering a species does not protect it. Without formal habitat protection, active management, and sustained funding, the same forces that drove G. extinctus to the edge of extinction continue operating.

Funding for tropical plant conservation is chronically scarce. A 2024 analysis from Global Change Biology noted that search-and-rediscovery programs are often one-off efforts, without the long-term institutional commitment needed to secure species beyond the moment of rediscovery.

• Field surveys and monitoring require repeat visits, which demand transport, equipment, personnel time, and institutional partnerships that must be maintained over years, not weeks.
• Local conservation capacity in Ecuador’s western lowlands is limited, and international funding cycles rarely align with the long-term timescales of plant population dynamics.
• Publication of specific location data, while necessary for transparency, creates a risk of increased visitation by collectors or developers who now know where rare populations exist.

2. Need for Habitat Preservation

The single most important factor for G. extinctus’s long-term survival is the physical protection of the forest fragments it currently occupies. Without legal protection, each fragment remains vulnerable to clearing.

Ecuador’s cloud forest in this region has no equivalent replacement: the soil structure, microclimate, and biological community that support G. extinctus took centuries to develop and cannot be reconstructed by planting trees alone.

3. Risks of Extinction Despite Rediscovery

The conservation biology literature is clear on this point: Critically Endangered species with extremely small, fragmented populations face real extinction risk even after rediscovery.

A 2024 report from Re:wild’s Search for Lost Species program documented that of the 12 most-wanted lost species found since the program launched in 2017, most remain in immediate danger despite public attention. Finding a species alive is the beginning of a conservation challenge, not the resolution of one.

Christenhusz and Govaerts (2024) estimated that approximately 850 plant species have gone extinct since the era of Linnaeus, a figure that represents a current extinction rate 500 times higher than the natural background rate for plants before the Anthropocene era.

Gasteranthus extinctus represents a rare positive exception to this trend, but its Critically Endangered status means it could yet become part of this statistic without active intervention.

Other Recently Rediscovered Plant Species

1. Similar Examples From South America and Beyond

Gasteranthus extinctus is not the only plant species to beat the odds. In 2024, a 2024 Cambridge University Press study reported the rediscovery of Asplenium achalense, a lost fern from South America, not seen since its original collection, through systematic herbarium reanalysis combined with targeted fieldwork.

In Australia, Ptilotus senarius, a flowering shrub last recorded in 1967, was rediscovered in June 2025 when horticulturist Aaron Bean uploaded photographs of an unusual plant to iNaturalist, and expert volunteers confirmed the identity within hours. These cases show that citizen science platforms now play a legitimate role alongside formal expeditions.

2. Comparison With Other “Lost and Found” Species

The broader pattern of species rediscovery carries both encouragement and caution. In 2023, Attenborough’s long-beaked echidna was rediscovered in Papua New Guinea after decades without confirmed sightings.

The Victorian grassland earless dragon reappeared in Australia in 2023 after being absent for over 50 years. According to Re:wild, which maintains a formal search list updated with 2024 data, there are currently more than 2,200 lost species across 160 countries actively being sought by scientists.

A July 2024 study in Global Change Biology, led by Thomas Evans of the Free University of Berlin, set out to bring systematic science to the search by analyzing what characteristics make a lost species more or less likely to be found again. The study’s findings are now being used to prioritize search efforts by organizations including Re:wild.

3. Broader Conservation Trends

The world lost 6.7 million hectares of tropical primary rainforest in 2024 alone, the highest annual figure since satellite monitoring began, according to data from the Global Forest Watch platform published by the University of Maryland.

Set against that backdrop, individual rediscoveries demonstrate the value of continued field exploration but do not change the overall trajectory. The conservation community increasingly recognizes that species-by-species rescue efforts, while vital, must be accompanied by large-scale habitat protection to be effective long-term.

What the Rediscovery Means for Global Conservation

1. Importance of Continued Field Research

The rediscovery of Gasteranthus extinctus makes a concrete case for sustained investment in botanical field research, particularly in regions like western Ecuador where deforestation has been severe and species inventories remain incomplete.

It also highlights the value of herbarium collections: the original four specimens collected between 1977 and 1985 preserved enough morphological information that a field team working 40 years later could identify the plant in the field from dried material alone.

2. Hope for Locating Other Missing Species

G. extinctus belongs to a broader category that conservation biologists call Lazarus taxa, species presumed extinct that reappear after long absences, named for the biblical figure raised from the dead.

Every confirmed Lazarus taxon provides evidence that other lost species may still survive in overlooked corners of degraded landscapes. It validates the ongoing investment in field surveys even in areas previously dismissed as too damaged to hold rare species.

3. Role of Local Communities and Scientists

The Field Museum expedition succeeded in part because of collaboration with Ecuadorian botanists embedded in local institutions. Washington Santillán, Hermogenes, and other local team members provided knowledge of the terrain, established connections with landowners, and will continue monitoring after the international team departs.

Long-term conservation of species like G. extinctus depends on exactly this kind of local scientific capacity being built and funded over time.

4. Future Outlook for Endangered Plants

The IUCN Red List 2025 assessment across 169,420 species confirmed the scale of the challenge: a substantial share of assessed species remains threatened with extinction. For plants specifically, the Statista 2025 data confirm that Ecuador ranks third globally by number of threatened species, with plants making up approximately three-quarters of that total.

Gasteranthus extinctus is one of those plants. Its rediscovery shifts its conservation status from presumed extinct to Critically Endangered, which is progress in the sense that it opens the door to formal protective action. But it also brings the responsibility to act before the door closes again.

Global Forest Watch (University of Maryland, 2024) found that global tropical primary forest loss in 2024 reached 6.7 million hectares, nearly twice the area lost in 2023, and equivalent to the land area of Panama disappearing in a single year.

At this rate of habitat loss, newly rediscovered species like G. extinctus face compounding threats that make site-level protection decisions extraordinarily time-sensitive.

Conclusion

The rediscovery of Gasteranthus extinctus is proof that hope has a scientific basis. It shows that degraded landscapes still hold species worth saving, that citizen science platforms accelerate discovery, and that targeted expeditions produce results even when expectations are low. But hope requires action to become outcome. The story of this lost South American wildflower named extinctus is not yet finished. Whether it ends in permanent extinction or genuine recovery depends on conservation choices being made right now in the forests of western Ecuador.