Borah, Dipankar

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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.)

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.)