| Rank | Name | Key Note |
|---|---|---|
| Kingdom | Plantae | Plants |
| Clade | Angiosperms | Flowering plants |
| Clade | Eudicots | True dicotyledons |
| Clade | Asterids | Star-shaped petal clade |
| Order | Ericales | Heath order — includes tea, blueberry, rhododendron |
| Family | Ericaceae | Heath / Heather family — blueberry, cranberry, bilberry |
| Genus | Vaccinium | ~450+ species globally; includes all blueberries, cranberries |
| Species | V. piliferum | Latin: pili = hair; ferum = bearing → "hairy-bearing" |
| Described by | C.B. Clarke | Based on Griffith's 1836 collection |
| IUCN Status | Endangered (EN) | IUCN Red List — high risk of extinction in wild |
Vaccinium comes from Latin for "of cows" or possibly linked to baccinium (berry-bearing). piliferum = Latin pilum (hair) + ferre (to bear) → hairy-fruited or hairy-bearing species. The name reflects the plant's distinctive pubescent (hair-covered) surface characteristics.
| Term | Meaning | Relevance to This Topic |
|---|---|---|
| Crop Wild Relative (CWR) | Wild plant closely related to a cultivated crop | V. piliferum is a wild relative of commercial blueberry — critical for crop improvement |
| Ericaceae | Heath/Heather plant family | Family to which V. piliferum, blueberry, cranberry, rhododendron all belong |
| Botanical Rediscovery | Relocating a species lost to science for decades/centuries | V. piliferum lost for 188 years; rediscovery ≠ new species discovery |
| Pubescent | Covered with fine short hairs | Characteristic feature giving the species its name (piliferum) |
| Endangered (EN) | IUCN category: high risk of extinction in wild | V. piliferum is IUCN Endangered — only 16 plants found in survey |
| Feddes Repertorium | Prestigious German botanical journal (est. 1905) | Journal where the 2026 rediscovery paper was published |
| CSIR-NEIST | Council of Scientific & Industrial Research – North East Institute of Science & Technology | Lead research institution for the rediscovery |
| SEED | Society for Education and Environmental Development | Collaborating NGO in the rediscovery project |
Vaccinium genus has 450+ species globally. The Eastern Himalaya is a global centre of Vaccinium diversity.
UPSC may test: Which family does blueberry belong to? → Ericaceae. Also note that Rhododendron — the iconic Eastern Himalaya plant and Arunachal Pradesh's state flower — also belongs to the same Ericaceae family. This connection can appear in statement-based questions.
| Person | Role | Key Fact |
|---|---|---|
| William Griffith | First discoverer (1836) | British botanist, East India Company surgeon; explored Mishmi Hills in 1836; first European in the Mishmee Mountains; died 1845 in Malacca |
| Joseph Dalton Hooker | Second collector (1850) | Legendary British botanist; later Director, Kew Gardens; co-collected from Khasi Hills, Meghalaya; wrote Flora of British India |
| T. Thomson | Co-collector (1850) | British surgeon-botanist; collaborated with Hooker on Indian botany expeditions |
| Vinay Kumar Sahani | Field rediscoverer (2024) | Botany graduate student; collected specimens from Vijoynagar outskirts, Oct 2024 |
| Dr. Subhasis Panda | Taxonomic identifier & paper author | India's leading Vaccinium expert; corresponding author of Feddes Repertorium paper; trained at Central National Herbarium & AJCBIBG, Howrah |
1836 → First discovery · 1850 → Last historical sighting · 188 years → Gap between 1836 and 2024 · 16 → Individual plants found · October 2024 → Rediscovery date · May 2026 → Publication in Feddes Repertorium
The gap is often stated as "188 years" counting from the 1836 first discovery. Some sources may compute from the 1850 Meghalaya collection, which gives ~174 years. UPSC-facing sources consistently use "nearly 188 years" (from 1836). Use 188 years in your answer.
| Parameter | Details |
|---|---|
| Official Name | Vijoynagar (also Vijay Nagar / Vijaynagar) |
| Local Name | Daudi (Lisu/Yobin tribal name) |
| District | Changlang, Arunachal Pradesh |
| Status | Easternmost inhabited area of India; circle (tehsil) headquarters |
| Border | Surrounded by Myanmar on three sides (east, south, west); flanked by Namdapha National Park on the north |
| Established | 1965 (settled by Assam Rifles personnel under Maj. Gen. A.S. Guraya) |
| Population | ~4,500 (55% retired Assam Rifles, 45% civilian Lisu/Yobin tribe) |
| Connectivity | Air-maintained for decades; road (NH-913 / Arunachal Frontier Highway) connected for first time in 2023 |
| Site of Rediscovery | Near tributaries of the Noa-Dihing River, dense forests on outskirts of Vijoynagar |
| Feature | Details |
|---|---|
| Origin | Originates at the Chaukan Pass on the Indo-Myanmar border |
| Flow | Flows westwards through Namdapha National Park |
| Tributary of | Brahmaputra River system |
| Significance | Central river of Namdapha NP; V. piliferum found near its tributaries in Vijoynagar forests |
| Park context | Namdapha NP is bordered by the Dapha (north) and Noa-Dihing rivers |
The rediscovery site is located adjacent to Namdapha National Park (Vijoynagar circle falls to the south-east of the park's boundary). Key Namdapha facts for UPSC:
| Parameter | Data |
|---|---|
| Location | Changlang district, Arunachal Pradesh |
| Area | 1,985.23 km² |
| Established | Wildlife Sanctuary: 1972 → National Park + Tiger Reserve: 1983 |
| Altitudinal range | 200 m to 4,571 m (Dapha Bum — highest peak) |
| Unique distinction | Only national park in the world with all 4 big cat species: Tiger, Leopard, Clouded Leopard, Snow Leopard |
| Floral species | 1,000+ floral species |
| Faunal species | 1,400+ faunal species |
| UNESCO status | On tentative list for World Heritage Site |
| Name origin | Singpho words: Nam (water) + Dapha (origin) |
| Feature | Details |
|---|---|
| Location | Present-day Dibang Valley district, Arunachal Pradesh |
| Range | Part of the Eastern Himalaya; includes Dapha Bum |
| 1836 discovery | William Griffith collected V. piliferum here on 26 November 1836 |
| Note | Mishmi Hills ≠ Changlang district (where 2024 rediscovery happened). Two separate locations ~200 km apart in Arunachal Pradesh. |
The 1836 first discovery was from Mishmi Hills (Dibang Valley). The 2024 rediscovery was from Vijoynagar (Changlang district). These are two different districts of Arunachal Pradesh. Do not confuse them. Also, the 1850 Hooker-Thomson record was from Khasi Hills, Meghalaya — a different state entirely.
| Plant | Genus | Economic/Ecological Importance | Found in India |
|---|---|---|---|
| Blueberry (cultivated) | Vaccinium corymbosum | Major commercial berry crop globally | Cultivated in Himachal, Uttarakhand |
| V. piliferum | Vaccinium | Crop wild relative; IUCN Endangered; 188-year rediscovery | Eastern Himalaya (Arunachal Pradesh) |
| Cranberry | Vaccinium macrocarpon | Commercial berry; antioxidant-rich | Not native to India |
| Bilberry | Vaccinium myrtillus | Medicinal; eye health applications | Higher Himalayas |
| Rhododendron | Rhododendron spp. | State flower (Arunachal, Uttarakhand, Sikkim, HP); ecological indicator; 52 species in Arunachal alone | Eastern & Western Himalaya |
| Tea plant | Camellia sinensis | Most consumed beverage plant; India's major export crop | Assam, Darjeeling, Nilgiris |
Both Tea (Camellia sinensis) and Rhododendron belong to the Order Ericales but to different families (Theaceae and Ericaceae respectively). The Vaccinium genus (blueberries) is in family Ericaceae, Order Ericales.
V. piliferum is classified as a Crop Wild Relative (CWR) of the cultivated blueberry. CWRs are of immense scientific value for:
| Application | How V. piliferum Can Help |
|---|---|
| Climate Resilience | Wild relatives evolve natural tolerance to heat, drought, frost — traits transferable to commercial crops via breeding |
| Disease Resistance | Wild populations carry natural resistance genes absent in cultivated blueberry monocultures |
| Crop Improvement | Genetic material from wild relatives can boost yield, nutritional content, shelf life of cultivated blueberries |
| Food Security | Maintaining genetic diversity in wild relatives is a long-term insurance against crop failures |
| Bioprospecting | Potential medicinal compounds (anthocyanins, antioxidants) in wild Vaccinium species |
According to IUCN (2021), 35% of crop wild relative species are threatened with extinction globally. Wild Vaccinium relatives in the Eastern Himalaya are particularly at risk due to deforestation, climate change, and habitat loss.
| Function | Details |
|---|---|
| Understorey biodiversity | Vaccinium shrubs form key understorey layer in Himalayan temperate and subtropical forests |
| Food source | Berries feed birds, bears, small mammals — critical in the food web |
| Soil acidification | Ericaceous plants (like Vaccinium) prefer and maintain acidic soils critical for certain ecosystems |
| Pollination web | Vaccinium flowers support native bee and pollinator populations |
| Riparian buffer | Found near Noa-Dihing tributaries — riparian zone plants prevent soil erosion |
| Feature | Details |
|---|---|
| Full Name | Feddes Repertorium |
| Country | Germany |
| Type | International peer-reviewed botanical/taxonomic journal |
| Significance | One of the oldest and most respected botanical journals in the world (est. 1905) |
| Publisher | Wiley-VCH (Wiley Online Library) |
| Recent India papers | Multiple 2025–2026 papers on new species/records from Arunachal Pradesh and NE India |
UPSC has asked about Crop Wild Relatives in context of food security and biodiversity. The key angle: wild relatives of crops are genetic reservoirs for breeding programs addressing climate change and disease resistance. V. piliferum exemplifies this — its rediscovery opens doors to blueberry crop improvement research.
Concept coined by Norman Myers (1988). Currently managed by Conservation International. India has 4 hotspots if Indo-Burma and Sundaland are included; strictly within India's borders — Western Ghats and Eastern Himalaya.
| Parameter | Data / Fact |
|---|---|
| Forest cover | ~62% of total land area |
| Flowering plant species | 5,000+ varieties |
| Share of India's flowering plants | ~50% of total Indian species |
| Orchid species | 530+ (545 species in 122 genera endemic to Arunachal region; 12 endangered, 16 vulnerable) |
| Rhododendron species | 52 species (85% of India's rhododendron diversity) |
| Bird species | 650+ |
| Faunal species | 500+ types |
| National Parks | 2 — Namdapha (Changlang) and Mauling (Upper Siang) |
| Wildlife Sanctuaries | 11 — Mehao, Pakhui, Eagle's Nest, Kamlang, Itanagar, Dibang, Ering, Kane, Dying, Sessa Orchid, etc. |
| State area | 83,743 km² |
| Biogeographic zones | Spans Himalayan + Trans-Himalayan + Northeast Indian zones |
| Parameter | Eastern Himalaya | Western Ghats |
|---|---|---|
| States covered | Arunachal Pradesh, Sikkim, parts of Assam, West Bengal | Gujarat, Maharashtra, Goa, Karnataka, Kerala, Tamil Nadu |
| Key feature | Highest alpine biodiversity; "cradle of flowering plants" | Highest amphibian diversity in India; UNESCO World Heritage |
| Major NPs (India) | Namdapha, Manas, Kaziranga, Khangchendzonga | Silent Valley, Periyar, Anamalai, Kudremukh |
| Iconic species | Snow leopard, red panda, hoolock gibbon, Namdapha flying squirrel | Lion-tailed macaque, Nilgiri tahr, King cobra |
| Plant families dominant | Ericaceae, Orchidaceae, Rhododendron | Dipterocarpaceae, Myristicaceae |
UPSC frequently tests: How many biodiversity hotspots in India? → 4 (Western Ghats, Eastern Himalaya, Indo-Burma, Sundaland/Nicobar). How many are strictly within India's boundaries? → 2 (Western Ghats + Eastern Himalaya). The Eastern Himalaya is described as the "cradle of flowering plants" with 50% of India's flowering plant species.
| Category | Symbol | Meaning |
|---|---|---|
| Extinct | EX | No known individuals remaining |
| Extinct in the Wild | EW | Survives only in captivity/cultivation |
| Critically Endangered | CR | Extremely high risk of extinction |
| Endangered | EN | High risk of extinction in the wild → V. piliferum falls here |
| Vulnerable | VU | High risk of endangerment in the wild |
| Near Threatened | NT | May be at risk in near future |
| Least Concern | LC | Widespread and abundant |
| Data Deficient | DD | Insufficient data to assess |
| Not Evaluated | NE | Not yet assessed against criteria |
V. piliferum is listed as Endangered (EN) on the IUCN Red List. With only 16 individual plants recorded in the 2024 survey, its actual population status in the wild is critically fragile — it may warrant reassessment to Critically Endangered status.
| Provision | Section / Rule | Relevance to V. piliferum |
|---|---|---|
| Threatened species protection | Central Govt in consultation with NBA | Endangered species like V. piliferum can be notified as threatened; collection regulated |
| Biodiversity Heritage Sites | Section 37(1) | Vijoynagar's forests could be notified as Biodiversity Heritage Site; 44 such sites notified in India so far |
| National Biodiversity Authority (NBA) | Chapter III | Regulates access to Indian biological resources; approves research on species like V. piliferum by foreign entities |
| Biodiversity Management Committees (BMC) | Section 41 | Local bodies at panchayat level maintain People's Biodiversity Register (PBR) — records rare species |
| ABS — Access and Benefit Sharing | Chapter IV | Any commercial use of V. piliferum's genetic material requires equitable benefit sharing with local communities (Lisu/Yobin tribe in Vijoynagar) |
| Prohibition on bio-piracy | Section 6 | Patent applications based on Indian biological resources (like V. piliferum) need NBA approval |
| Law/Convention | Year | Relevance |
|---|---|---|
| Convention on Biological Diversity (CBD) | 1992 (Rio Earth Summit) | India signatory; BD Act 2002 enacted to meet CBD obligations; 3 objectives: conservation, sustainable use, ABS |
| Nagoya Protocol on ABS | 2010 (Nagoya, Japan) | Supplementary protocol to CBD; strengthens equitable benefit sharing when using genetic resources from CWRs like V. piliferum |
| Wildlife Protection Act, 1972 | 1972 | Schedule VI protects specified plant species; threatened plants can be listed; prohibits trade, possession, uprooting |
| International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA) | 2001 (FAO) | Governs access to plant genetic resources including CWRs; relevant for blueberry relatives |
| National Biodiversity Strategy & Action Plan (NBSAP) | India, 2008/updated 2014 | India's roadmap for BD conservation including threatened plant species |
With only 16 individual plants found, V. piliferum has one of the smallest known wild populations of any plant species in India. Conservation priorities include: in-situ conservation (protecting the Vijoynagar forest habitat), ex-situ conservation (seed banking, tissue culture at institutions like the Central National Herbarium), and legal protection under Schedule VI of the Wildlife Protection Act.
| Concept | Connection to V. piliferum | Key Fact |
|---|---|---|
| Eastern Himalaya Biodiversity Hotspot | V. piliferum is endemic to this hotspot; rediscovery validates the hotspot's unexplored potential | 1 of 36 global hotspots; India has 4 |
| Crop Wild Relatives (CWR) | V. piliferum = CWR of cultivated blueberry; critical genetic resource for agriculture | 35% of CWRs globally threatened (IUCN) |
| Namdapha National Park | Rediscovery site is in Vijoynagar circle adjacent to Namdapha; same ecosystem | World's only 4-big-cat national park |
| Convention on Biological Diversity (CBD) | V. piliferum's access, research, and benefit sharing governed by CBD framework | Signed 1992 at Rio; BD Act 2002 implements it in India |
| Nagoya Protocol | Any commercial exploitation of V. piliferum's genetic material needs ABS compliance | 2010, Nagoya, Japan; entered into force 2014 |
| Botanical Survey of India (BSI) | BSI's Central National Herbarium (Howrah) trained Dr. Panda who identified the species | BSI est. 1890; publishes Plant Discoveries annually |
| CSIR-NEIST | Lead research institution for the rediscovery project | Located in Jorhat, Assam; NE India's premier science institute |
| Arunachal Frontier Highway (NH-913) | Road connectivity to Vijoynagar achieved in 2023 — improves field access for biodiversity surveys | Connects Vijoynagar to Miao (157 km) |
| Climate Change & Biodiversity | V. piliferum's rarity partly attributed to habitat loss and climate shifts in Eastern Himalaya | CWRs are key for developing climate-resilient crops |
| Acharya JC Bose Indian Botanic Garden | Where Dr. Panda (paper's corresponding author) received training | Located in Howrah, West Bengal; largest botanic garden in Asia |
| Hotspot | Within India's boundaries? | States Covered | Key Feature |
|---|---|---|---|
| Eastern Himalaya | ✅ Yes (fully) | Arunachal Pradesh, Sikkim, WB (Darjeeling), parts of Assam | Cradle of flowering plants; highest plant endemism |
| Western Ghats | ✅ Yes (fully) | Gujarat, Maharashtra, Goa, Karnataka, Kerala, TN | UNESCO WHS; highest amphibian diversity |
| Indo-Burma | Partially (NE India) | Manipur, Nagaland, Mizoram, Tripura, Meghalaya | High freshwater fish diversity |
| Sundaland | Partially (Nicobar Islands) | Nicobar Islands (A&N) | High marine and coral diversity; Leatherback turtles |
UPSC may ask about the Acharya Jagadish Chandra Bose Indian Botanic Garden (AJCBIBG) in context. It is located in Howrah, West Bengal, is managed by the Botanical Survey of India (BSI), and houses the Central National Herbarium — India's most important herbarium, where specimens of rediscovered species like V. piliferum are verified and deposited.
Researchers have rediscovered Vaccinium piliferum, a rare and endangered wild relative of the blueberry, in the remote forests of Vijoynagar, Changlang district, Arunachal Pradesh, nearly 188 years after it was first recorded in 1836. The rediscovery was confirmed by researchers from SEED, CSIR-NEIST, and collaborating institutions. Only 16 individual plants were recorded near tributaries of the Noa-Dihing River. Experts called it "a major botanical achievement and an important addition to India's biodiversity records."
The research paper "Rediscovery of Vaccinium piliferum: An Endangered Species from the Eastern Himalaya Hotspot" was published in the prestigious German journal Feddes Repertorium. Specimens were collected in October 2024 from the outskirts of Vijoynagar by botany researcher Vinay Kumar Sahani. The species was identified by Dr. Subhasis Panda (corresponding author), India's leading blueberry expert trained at the Central National Herbarium and Acharya Jagadish Chandra Bose Indian Botanic Garden.
Arunachal Pradesh Deputy Chief Minister Chowna Mein described the rediscovery as "a remarkable chapter in the natural history of Arunachal Pradesh," adding that it "highlights the immense ecological wealth of our state and reinforces the urgent need to protect and preserve our fragile Himalayan ecosystems for future generations." The discovery was the first since William Griffith's original collection on 26 November 1836 from the Mishmi Hills (present-day Dibang Valley district).
The field survey was conducted in Vijoynagar in Changlang district by researchers from the Society for Education and Environmental Development (SEED) and CSIR-North East Institute of Science and Technology (CSIR-NEIST). The species was first documented in November 1836 by William Griffith from Mishmi Hills; a second collection was made in 1850 from Meghalaya's Khasi Hills by Joseph Dalton Hooker and T. Thomson. After that second record, no botanist had traced the species for generations, leading many to believe it had disappeared.
This news item is high-probability for UPSC Prelims 2027 as a statement-based question or standalone MCQ. Likely tested angles: (1) Family of V. piliferum → Ericaceae; (2) District/State where rediscovered → Changlang, Arunachal Pradesh; (3) First discoverer → William Griffith, 1836; (4) IUCN status → Endangered; (5) Gap in years → 188 years; (6) Number of plants found → 16; (7) Journal of publication → Feddes Repertorium (Germany); (8) Research body → CSIR-NEIST.
This rediscovery fits into a broader pattern of India's accelerating biodiversity documentation:
| Parameter | 2024 Data (BSI/ZSI) |
|---|---|
| New fauna species + records | 683 (459 new species + 224 new records) |
| New flora taxa | 433 taxa (410 species + 23 infra-specific taxa) |
| Arunachal Pradesh faunal discoveries | 72 (42 new species + 30 new records) — highest in NE India |
| Top state for faunal discoveries | Kerala (101 discoveries) |
| # | Statement | ✅/❌ | Reason |
|---|---|---|---|
| 1 | Vaccinium piliferum belongs to the family Rosaceae | ❌ False | It belongs to Ericaceae (Heath family), not Rosaceae (rose family) |
| 2 | V. piliferum was first discovered in the Khasi Hills of Meghalaya in 1836 | ❌ False | First discovered in Mishmi Hills, Arunachal Pradesh (1836); Khasi Hills record was in 1850 |
| 3 | V. piliferum is listed as Critically Endangered on the IUCN Red List | ❌ False | It is listed as Endangered (EN), not Critically Endangered (CR) |
| 4 | The 2024 rediscovery was made near tributaries of the Noa-Dihing River | ✅ True | Specimens collected near Noa-Dihing River tributaries in Vijoynagar forests |
| 5 | Namdapha National Park is in Changlang district of Arunachal Pradesh | ✅ True | Namdapha NP is in Changlang district; Vijoynagar circle is adjacent to it |
| 6 | The Vaccinium genus has fewer than 100 species globally | ❌ False | Vaccinium genus has 450+ species globally |
| 7 | William Griffith first collected V. piliferum on 26 November 1836 | ✅ True | Exact date confirmed: 26 November 1836, Mishmi Hills |
| 8 | Vijoynagar is bordered by China on three sides | ❌ False | Vijoynagar is bordered by Myanmar on three sides, not China |
| 9 | The rediscovery paper was published in Feddes Repertorium, a French botanical journal | ❌ False | Feddes Repertorium is a German botanical journal |
| 10 | India has exactly two biodiversity hotspots | ❌ Partially False | India has 4 hotspots total (including Indo-Burma and Sundaland). But only 2 are fully within India's borders (Western Ghats + Eastern Himalaya). |
Students often confuse Ericaceae (blueberry, rhododendron, cranberry) with Rosaceae (rose, apple, strawberry, peach). Ericaceae plants generally grow on acidic soils, have bell-shaped tubular flowers, and produce berry-type fruits. Key Ericaceae members for UPSC: blueberry, cranberry, rhododendron, heather, bilberry, and tea plant (Camellia — in order Ericales but family Theaceae).
Three distinct locations: Mishmi Hills (Dibang Valley, AP) = 1836 discovery · Khasi Hills (Meghalaya) = 1850 collection · Vijoynagar (Changlang, AP) = 2024 rediscovery. UPSC questions may mix these up. Remember: rediscovery is in Changlang, not Dibang Valley.
Endangered ≠ Critically Endangered. V. piliferum is Endangered (EN). With only 16 plants found, it seems like it should be Critically Endangered, but the IUCN listing is Endangered. Do not upgrade it on your own. Always use the listed category.
The "188 years" is counted from 1836 (first discovery) to 2024 (rediscovery). Some may argue from the 1850 Meghalaya sighting, giving ~174 years. Official sources consistently state "nearly 188 years" from the 1836 discovery. Use this number in answers.
Vijoynagar is bordered by Myanmar on three sides, and the Namdapha National Park on the other (north). It is NOT bordered by China. The nearest city in Myanmar is Putao (40 km away). India's nearest town is Miao (157 km away).
Namdapha NP is the only national park in the world with all four big cat species: Tiger, Leopard, Clouded Leopard, Snow Leopard. This is a common UPSC fact. Do not confuse with Kaziranga (one-horned rhino fame) or Manas (Project Tiger + Project Elephant).
UPSC Prelims 2025 asked about rediscovered species and biodiversity hotspot facts. For V. piliferum, expect: (a) Match the following (species-family, species-location), (b) Statement-based T/F (1836 date, IUCN status, family), (c) Standalone MCQ (in which state was V. piliferum rediscovered?). The Geography-Environment-Current Affairs overlap makes this a high-value topic.
| Person | Year | Location | Role |
|---|---|---|---|
| William Griffith | 1836 | Mishmi Hills (Dibang Valley, AP) | First discovery |
| J.D. Hooker + T. Thomson | 1850 | Khasi Hills, Meghalaya | Second & last historical collection |
| Vinay Kumar Sahani | Oct 2024 | Vijoynagar, Changlang, AP | Field rediscovery (collection) |
| Dr. Subhasis Panda | 2024–2026 | CSIR-NEIST / CNH Howrah | Taxonomic identification & paper author |