Borah, Dipankar

Publications are listed below:

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)

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)

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) 

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)

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)

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)

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) 

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))

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)

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)

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)

(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)

(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) 

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 sinohirsuta J. Q. Li & Soejarto (Actinidiaceae) is reported for the first time from Arunachal Pradesh, India)

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))

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)

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)

(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)