Borah, Dipankar

Publications are listed below:
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Two new species of Henckelia (Gesneriaceae) from the Eastern Himalayan state Arunachal Pradesh, India– Momang Taram, Dipankar Borah, Rajeev Kumar Singh, Hui Tag- August 2021 Feddes Repertorium (Two new species of Henckelia from the Eastern Himalayan state Arunachal Pradesh, India, are described and illustrated. The first, Henckelia dasii Taram,
D.Borah, R.Kr.Singh & Tag is allied to H. umbellata Kanthraj & K.N.Nair, the second, H. lallanii Taram, D.Borah, Tag & R.Kr.Singh is close to H. urticifolia (Buch.-Ham. ex D.Don) A.Dietr. (type species of the former Chirita sect. Chirita). The differences are given in Table 1 and 2, respectively. A key is presented for the 21 Henckelia species presently known from N and NE India.)
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The rediscovery of Strobilanthes tubiflos (Acanthaceae) in north east India– John R. I. Wood, Dipankar Borah & Momang Taram- Kew Bulletin (2021) (Summary: The recently rediscovered Strobilanthes tubiflos (C.B.Clarke) J.R.I.Wood is fully described for the first time. A key and photographs are provided to enable identification of similar species found in north east India. The rediscovery of S. tubiflos is discussed in the context of the botanical exploration of the region and the implications for conservation.)
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NEW RECORD OF NEOPICRORHIZA MINIMA R.R.MILL (PLANTAGINACEAE) TO THE FLORA OF INDIA– Dipankar Borah, Rajeev Kumar Singh– Mongolian Journal of Biological Sciences Vol 19, No 1 (2021)- (Abstract- Neopicrorhiza minima, an endemic and rare herb of Bhutan is reported for the first time for the flora of India from Tawang district of Arunachal Pradesh state. The species is known only by the type collections from Bhutan of the year 1933, 1949 and 1966. The present collection is also a rediscovery of this rare species after the lapse of 52 years from India.)
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Begonia kekarmonyingensis (Begoniaceae), a new species from Arunachal Pradesh, Northeast India– Momang Taram, Dipankar Borah & Mark Hughes- April 2021 Phytotaxa 494(3):268-272 (Abstract- A new species of Begonia sect. Platycentrum, B. kekarmonyingensis, from Kekar Monying, a place of historical significance in Arunachal Pradesh, Northeast India is illustrated and described. It is allied to B. cathcartii and B. menglianensis, and morphological similarities and differences between the species are discussed. It has been assessed as Vulnerable according to IUCN Red List criteria.)
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Rediscovery of Didymocarpus hookeri (Gesneriaceae), An Endemic, Rare Herb after 81 years from India– Dipankar Borah and Rajeev Kr. Singh- Indian Forester, 147 (3) : 309-310, 2021
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The New Circumscription of Hoya oreogena (Apocynaceae-Asclepiadoideae) with the First Record for the Indian Flora– Michele RODDA, Dipankar BORAH, and Momang TARAM- February 2021 Journal of Japanese Botany 96(1):25-28
(Abstract- Hoya oreogena Kerr (Apocynaceae), so far known from Thailand and Myanmar, is reported for the first time from India. Synonimization of H. salweenica Tsiang & P.T.Li and H. revolubilis Tsiang & P.T.Li has also been made. Its distribution extends to China (Abstract- Hoya oreogena Kerr (Apocynaceae), so far known from Thailand and Myanmar, is reported for the first time from India. Synonimization of H. salweenica Tsiang & P.T.Li and H. revolubilis Tsiang & P.T.Li has also been made. Its distribution extends to China)
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Cremanthodium indicum (Asteraceae, Senecioneae), a new species from the Eastern Himalaya, India – March 2021 Biodiversitas Journal of Biological Diversity 22(3):1272-1276
(Abstract- Cremanthodium indicum D.Borah, R.Kr. Singh & Thungon (Asteraceae, Senecioneae), a new species from Eastern Himalayan state Arunachal Pradesh, India is described and illustrated. The new species is allied to Cremanthodium nobile (Franch.) Diels ex H.Lév. in having elliptic-obovate basal leaves, solitary, nodding capitula and hemispheric involucre, but differs by densely pale yellow tomentose stem, stem leaves 5-9, 1.6-2.1 cm distant, outer phyllaries 2.3-2.8 mm wide, inner phyllaries elliptic, 3-5 mm wide, apex acute, ray lamina creamy, oblong, 2-2.3 cm long, apex truncate, distinctly 3-dentate, ray tube 1.5-2 mm long, tubular florets creamy, 8-9 mm long and pappus 6-8 mm long.)
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Aeschynanthus lineatus (Gesneriaceae)— A New Record for the Flora of India– Momang Taram & Dipankar Borah- February 2021 Journal of Japanese Botany 96(1):19-20 (pdf)
(Summary: Aeschynanthus lineatus Craib, previously known from Southern China, Myanmar and Thailand, is reported for the first time from India.)
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An inventory of the native flowering plants in East Siang District of Arunachal Pradesh, India– Momang Taram, Dipankar Borah, Dr HUI Tag and Ritesh Kumar Choudhary- December 2020 Journal of Threatened Taxa 12(17):17299–17322 (Abstract- The present study is an outcome of floristic surveys of East Siang District of Arunachal Pradesh, carried out during 2016–2019, and also a compilation of earlier published reports. Vegetation analysis of this area along with a checklist of 508 taxa is presented. A total of 503 species, one subspecies and four varieties of native flowering plants belonging to 348 genera and 102 families are reported. Among these, 11 taxa are endemic to India, two Critically Endangered, one Vulnerable, one Near Threatened, two Data Deficient, and others either Least Concern or Not Evaluated as per IUCN criteria. The study also documents two new distributional records for the flora of Arunachal Pradesh, and range extension of six lesser-known endemic species. The most dominant families were found to be Poaceae (27 species), followed by Lamiaceae (23 species), Gesneriaceae (22 species), and Rubiaceae (20 species). The number of new taxa described from the region, endemism, and the Red Listed plants strongly reflect the floristic importance of the region, which is in dire need of conservation.)
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Native vascular flora of Behali Reserve Forest (Assam, India) with global IUCN Red list assessment of two endemic species– Dipankar BORAH, Sumpam TANGJANG, Abhaya P. DAS, Parixit KAFLEY, Anatoliy A. KHAPUGIN- Contribuţii Botanice – 2020, LV: 27–48 (Abstract- The investigations of flora and fauna in Protected Areas provide important contributions to the knowledge on the status of unmanaged natural ecosystems. In 2017-2019, we studied the vascular plant flora of Behali Reserve Forest (Assam, India). The reserve forest covers 140.16 km 2 area of semi-evergreen forest. We investigated the taxonomic composition of the flora and diversity of growth forms of species and habitats. In addition, we conducted global IUCN Red List assessment of two endemic species, Aristolochia assamica and Chlorophytum assamicum. We found that the vascular plant flora of Behali Reserve Forest consists of 281 taxa, including 272 species, one subspecies and eight varieties. They belong to 206 genera and 79 families. Among them, Pandanus unguifer was recorded for the first time for the flora of Assam. In growth form spectrum of vascular plants, trees, vines and shrubs predominated, followed by epiphytes, forbs or herbs, geophytes, annuals and parasites. The largest number of vascular plants was found in dense forests, while open habitats were characterized by the smallest species richness. Chlorophytum assamicum is assessed as CR B1ab(iii)+2ab(iii); D, and Aristolochia assamica as EN B2ab(iii). At the same time, there is a threat of reduction or disappearance of their populations. This is especially crucial for C. assamicum, represented by a single world population. Undoubtedly, further investigations of flora could result in an increase in number of the vascular plant flora of Behali Reserve Forest, as well as providing essential insights into population trends of several other species as per IUCN Red List categories and criteria.)
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Rediscovery of Pedicularis denudata (Orobanchaceae), a little known, rare herb after 135 years from India– Dipankar Borah, Rajeev Kumar Singh and Arti Garg- October 2020 Phytotaxa 461(2):136-138
(Abstract- Pedicularis denudata Hooker is rediscovered from Arunachal Pradesh after a lapse of about 135 years confirming the second locality for India. This species is known to India and Nepal, represented only by a few herbarium specimens. Extended taxonomical description, habitat, phenology and color plates with the first available live photographs are provided)
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Aristolochia assamica (Aristolochiaceae), a new species from the East Himalayas– D. Borah & T.V. Do- Annales Botanici Fennici 56(4-6):253, October 2019
(Abstract: Aristolochia assamica D. Borah & T.V. Do (Aristolochiaceae), a new species from the East Himalayas (NE India) is described and illustrated. It has purplish to greenish terete stems, brownish ovate-lanceolate bracteoles with a short stalk at base and acuminate apex, cymes with 2–15 owers, fasciculate, on extremely short inorescence axes, a sessile utricle, creamy-white to greenish-yellow perianth with a brownish patch on its throat, a 1-lobed limb, oblong linear with a twisted cauda, and a 6-lobed gynostemium. According to these morphological characteristics, A. assamica should be placed in Aristolochia subgenus Aristolochia series Aristolochia. A detailed description, phenol-ogy, distribution and ecology as well as comparison with four morphologically closely similar species is presented. In addition, a key to the Indian species of Aristolochia subgenus Aristolochia section Aristolochia is provided)
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Rediscovery of Tupistra stoliczkana (Asparagaceae) in northeastern India and the identity of T. ashihoi– DIPANKAR BORAH, NORIYUKI TANAKA, LEONID V. AVERYANOV, MOMANG TARAM, DILIP KUMAR ROY– Phytotaxa 443 (2): 207–210, 2020
(Abstract- Mainland Southeast Asia, particularly southern China and eastern Indochina, is known as an important centre of diversity for Asparagaceae (Averynov & Tanaka 2012). Tupistra Ker Gawler (1814: 1655) belonging to the subfamily Nolinoideae (Chase et al. 2009) comprises a little more than 30 species (Averyanov et al. 2019). They spread across southern and south-eastern Asia, including Nepal, Bhutan, India, Bangladesh, Myanmar, Thailand, China, Laos, Vietnam, Malaysia and Indonesia (Tanaka 2010a). The genus is characterized usually by the leaves tapering into petiole, a relatively large stigma broader than the style, except for the very uncommon species T. siphonantha Tanaka, Vislobokov & Hannon (2018: 32), a stout terete style almost as thick as the ovary and tuberculate (rarely smooth), globular berry-like fruits (Tanaka 2010a). Eight species of Tupistra have been reported for India: T. ashihoi Roy, Odyuo & Averyanov (2017:52), T. clarkei Hooker (1892: 325), T. khasiana Roy, Mao & Averyanov (2017: 257), T. nagarum Odyuo, Roy & Mao (2018:2), T. nutans Wall. ex Lindley (1839: 1223), T. stoliczkana Kurz (1876: 199), T. tupistroides (Kunth 1848: 12) Dandy (1932: 329), and T. leonidii Roy & Mao (2018: 37). Among them, T. ashihoi and T. stoliczkana have an upright flowering stem, whereas the others have a flowering stem curved downwards)
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Strobilanthes twangensis (Acanthaceae), a new species from the East Himalayas– J.R.I.Wood & D.Borah, Kew Bulletin 74(3), September 2019 (pdf) (Abstract- A new species, Strobilanthes twangensis J.R.I.Wood & D.Borah is described from Arunachal Pradesh State in northeastern India near the border with Bhutan and Tibet. The new species is illustrated with photographs and its possible relationships with other Himalayan species are discussed)
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Rhynchotechum nirijuliense (Gesneriaceae), a new species from Northeast India– Taram & D.Borah- Gardens’ Bulletin Singapore 72(1): 125–129. 2020 (Abstract- A new species of Rhynchotechum (Gesneriaceae), Rhynchotechum nirijuliense Taram & D.Borah, is described from Nirijuli of Papum Pare district in Arunachal Pradesh, Northeast India. The new species is compared to Rhynchotechum ellipticum and R. calycinum. A detailed description, colour photographs and notes on the distribution and ecology of the new species are provided)
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Peliosanthes ligniradicis, a new species (Asparagaceae) from Arunachal Pradesh, NE India (pdf)- MOMANG TARAM, DIPANKAR BORAH, NORIYUKI TANAKA Phytotaxa 438 (1): 043–048, 2020
(Abstract- A new species of Peliosanthes named P. ligniradicis from Arunachal Pradesh, NE India, is described and illustrated here. It somewhat resembles P. subspicata described from NE India, but is distinguishable by the thicker, stilt-like, semi-woody roots, somewhat elongate (sub) moniliform stem, ovate-oblong or oblong perianth segments, and basally hexagonal and apically 6-crenate)
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Begonia oyuniae (Begonia sect. Monophyllon, Begoniaceae), a remarkable new species from Northeast India– M. Taram, D. Borah, N. Krishna, A.K. Pradeep, A. Amrutha & M. Hughes- Gardens’ Bulletin Singapore 72(1): 109–115. 2020-
(Abstract: The new species Begonia oyuniae M.Taram & N.Krishna is described from Arunachal Pradesh. It belongs to Begonia sect. Monophyllon A.DC., which is a new sectional record for India. Begonia oyuniae shares the ability to produce plantlets at the leaf tip with B. vagans Craib (Begonia sect. Alicida C.B.Clarke) and B. elisabethae Kiew (Begonia sect. Parvibegonia A.DC.), but differs from the former in having glabrous tepals (versus densely glandular hairy) and 2-locular ovaries (versus 3-locular), and from the latter in having an asymmetric androecium (not globose). It differs from the two other species in Begonia sect. Monophyllon in having leaves which have sinuate to lobed margins (not entire), and which produce plantlets around the margin)
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Pedicularis khoiyangii (Orobanchaceae), a new species from the Eastern Himalaya, India (pdf)- Dipankar Borah, Neelam Gap & Rajeev Kumar Singh- Phytotaxa 430(4):287-293, February 2020 (Abstract- Pedicularis khoiyangii D.Borah & R.Kr.Singh, is described as a new species from the Eastern Himalaya, India. The new species belongs to Pedicularis series Rudes Prain and is closely related to P. prainiana Maximowicz, but differs by its larger size, longer inflorescence, distal bracts ovate, shorter pedicels, smaller calyx, densely silky villous nature, calyx teeth shorter with entire margins, equal, smaller corolla tube, shortly beaked galea, tip slightly emarginate, labium as long as galea, lobes unequal, stamens inserted at the base of corolla tube, style projecting out of the galea. This is the tallest species of Pedicularis recorded so far from India) 
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Chlorophytum assamicum (Asparagaceae), a new species from Northeast India (pdf)- DIPANKAR BORAH, PARIXIT KAFLEY, ABHAYA P. DAS, SUMPAM TANGJANG, LEONID AVERYNOV, Phytotaxa 394(1):123-125 · February 2019
(Abstract- The genus Chlorophytum Ker Gawler (1808: 1071) (Asparagaceae), includes about 200 species (Govaerts et al. 2012) distributed in the Old World tropics (Mabberley 2017). In India, this genus is represented by 19 species (Malpure & Yadav 2009; Chandore et al. 2012), including the new species proposed below. Indian species of Chlorophytum are usually forest dwellers and are cryptophytic with aboveground organs disappearing in the dry season (Chandore et al. 2012). Most of the members of Chlorophytum, reported from India have their distribution in Western Ghats except C. nepalense (Lindley 1826: 277) Baker (1876: 320), C. comosum (Thunberg 1794: 63) Jacques (1862: 345), C. breviscapum Dalzell (1850: 141), and C. arundinaceum Baker (1876: 323) growing in northeastern Himalaya (Adsul 2015))
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Rhynchotechum parviflorum Blume (Gesneriaceae), a new record to mainland India– Momang Taram,  Puranjoy Mipun & Dipankar Borah-Journal of Threatened Taxa 12(1):15208-15211, January 2020
(Abstract- Rhynchotechum parviflorum is reported for the first time from Mainland India. Colored photograph and additional details are provided)
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Lysionotus gamosepalus var. gamosepalus (Gesneriaceae)—A New Record for the Flora of India– Momang Taram, Dipankar Borah & Alfred Joe- Journal of Japanese Botany 95(1):47-50 February 2020
(Summary: Lysionotus gamosepalus W. T. Wang var. gamosepalus (Gesneriaceae) is reported for the first time from India)
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Boeica multinervia K.Y. Pan (Gesneriaceae): a new record for India– Momang Taram, Dipankar Borah & Santhosh Nampy-Check List 16(1):89-92, January 2020 
(Abstract- We present the first record of Boeica multinervia (Gesneriaceae) for India, based on specimens from Sagalee, Arunachal Pradesh, India. The species is easily recognized due to its short internodes, stoloniferous habit, and glandular pubes-cent rosette leaves and inflorescence. Boeica multinervia is so far known only from (Xizang) China. A brief description along with additional notes and photographs are provided)
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(Abstract- While working on the floristic diversity of Eastern Himalayan state Arunachal Pradesh, India a remarkable species of Pseudobartsia was collected from Bomdila, West Kameng district at about 2500 m a.s.l. After a critical study including a comparison with its protologue and type specimens, it is identified as Pseudobartsia glandulosa, a little known, endangered small herb. The present collection is a rediscovery of this endangered species after the lapse of 179 years from India. Extended taxonomical description, color plates with the first available photographs are provided along with discussion on habitat, phenology and conservation status)
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(Abstract- A new species, Pseuderanthemum arunachalense from eastern Himalaya, India is described and lectotype for Pseuderanthemum album, P. leptanthum and Sphinctacanthus parkinsonii are designated here. The new species is easily distinguished from its allied species, P. leptanthum by its broad oblanceolate or broad elliptic, longer leaves, longer inflorescence, rachis stipitate glandular hairy, smaller peduncle, stipitate glandular hairy, pedicel stipitate glandular hairy and calyx stipitate glandular hairy, smaller flower, corolla tube broadly ovoid, shorter than limb, limb 1-lipped, smaller lobes, the entire abaxial surface and the base of adaxial surface densely stipitate glandular, smaller filaments, smaller style and smaller capsule)
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A New Record of Saurauia sinohirsuta (Actinidiaceae) for India– Momang T and Dipankar B- J. Jpn. Bot. 95(4): 249–251 (2020)
(Summary: Occurrence of Saurauia sinohirsutaJ. Q. Li & Soejarto (Actinidiaceae) is reported forthe first time from Arunachal Pradesh, India)
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Peliosanthes macrophylla var. assamensis (Asparagaceae), a new variety from Behali Reserve Forest in Assam, Northeast India– D. Borah, M. Taram, S. Tangjang, A. Upadhyaya, N. Tanaka- Blumea 65, 2020: 121–125
(Abstract: Peliosanthes macrophylla var. assamensis, a new variety from Behali Reserve Forest in Assam, Northeast India, is described with accompanying photos and relevant taxonomic data. It differs from var. macrophylla from Arunachal Pradesh and Sikkim, Northeast India, mainly by the staminal corona internally protruding near the middle (vs internally upright corona without a particular inward protrusion), shorter anthers somewhat divergent distally (vs nearly upright anthers), and longer, papillulate pistils exceeding the anthers (vs glabrous pistils not exceeding the anthers))
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Henckelia siangensis (Gesneriaceae): a remarkable new species from Northeast India– Momang Taram, Dipankar Borah, Ojar Taku & Dr HUI Tag- September 2020 PhytoKeys 160:1-6 (pdf)
(Abstract- Henckelia siangensis, a new species from Arunachal Pradesh of Northeast India, is described and illustrated here. The new species is remarkably different from all other allied species by its 5-winged calyx and elliptic-ovate calyx segments. It superficially resembles H. calva in glabrous stem and petioles, but differs from it in having persistent bracts, a campanulate 5-winged calyx and a style with glandular indumentum. A detailed morphological description, photographic illustration, and distribution of the new species are presented)
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Boeica arunachalensis (Gesneriaceae), a new species from Indian Eastern Himalaya and typification of five names in Boeica (pdf)- D. Borah, R.Kr. Singh, M. Taram and A.P. Das, September 2020 Indian Forester 146(9):871-874
(Abstract- Boeica arunachalensis, a species new to the science from eastern Himalayan state of India, Arunachal Pradesh is described. Coloured photo plate and micrograph of new species and its allied species B. fulva Clarke are provided. Identity of B. griffithii Clarke is discussed and lectotype are designated here for B. filiformis Clarke, B. fulva Clarke, B. griffithii Clarke, B. hirsuta Clarke and B. porosa Clarke)
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New records of four Pedicularis species (Orobanchaceae) for the flora of Arunachal Pradesh state, India and two new synonyms for P. pantlingii– Dipankar Borah, Rajeev Kumar Singh & Arti Garg- September 2020 NeBIO 11(3):180-186
(Abstract- Four species of Pedicularis L., namely P. longiflora var. tubiformis (Klotzsch) P.C. Tsoong, P. megalantha D. Don, P. pantlingii Prain and P. trichoglossa Hook. f. are reported here as new records for the flora of Arunachal Pradesh state. The present collection of P. pantlingii from Arunachal Pradesh, now becomes the second distributional locality in India. Original coloured and natural photographs are provided here for the first time for this species. P. pantlingii subsp. brachycarpa P.C. Tsoong ex C.Y. Wu & H. Wang and P. pantlingii var. chimiliensis Bonati are synominized here under species proper P. pantlingii)
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Beccarinda tonkinensis (Gesneriaceae), a new record for India
Lemmem Gammi, Dipankar Borah, Momang Taram, Hui Tag & Anatoliy A. Khapugin- Wulfenia 27 (2020): 139–144
(Abstract- We present the first record of Beccarinda tonkinensis (Pellegr.) B.L. Burtt (Gesneriaceae) for India on the basis of specimens collected in Kerang and Yosing, Siang district of Arunachal Pradesh, India. The species is easily recognized from its congeners by its decumbent stem, basal leaves, axillary cymes and broadly ovate bracts. Until now, Beccarinda tonkinensis has only been known from China and Vietnam. A brief description of the records along with additional notes and photographs are provided. On the basis of known data, we conducted IUCN Red List assessment of the species in India with status EN B1ab(iii)+B2ab(iii); C2a(i); D.)