Tien Hiep Nguyen's scientific contributions

Publications (16)

Preprint
Exploring the driving forces promoting speciation is a key question in evolutionary biology. Cycas bifida and C. micholitzii are two leaflets dichotomously divided Cycas species that have morphological similarities. Their distribution areas are separated by the RRFZ, a biogeographical barrier for Cycas species. The hypothesis for explaining their d...
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Two new species of Oreocharis Benth. from Fan Si Pan, the highest mountain in Vietnam (Sa Pa) are described and illustrated. Oreocharis grandiflora W.H.Chen, Q.H.Nguyen & Y.M.Shui, is similar to O. flavida Merr. from Hainan province, China, but differs mainly by its larger and infundibuliform corolla, stamens adnate to the base of the corolla tube...
Article
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Tupistra Ker Gawler (1814: 1655), which was later recircumscribed by Tanaka (2003a, 2010a), belongs to Nolinoideae of Asparagaceae (APG 2009, Chase et al. 2009). It comprises about 30 species (Tanaka 2010a, Averyanov et al. 2017, Govaerts 2017, Nguyen et al. 2017, Roy et al. 2017, Tanaka et al. 2017) distributed widely over subtropical to tropical...
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We describe and illustrate four new species, Peliosanthes choriandra, P. tatianae and Tupistra orlovii from central to northern Laos, and Rohdea filosa from northern Vietnam. These are all very local in distribution and endemic to the respective countries. We also report new localities and their ecological conditions for five other species of Pelio...
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This paper provides new data on 33 new or rare species of Hoya obtained in feldwork mainly during 2012–2017 in eastern Indochina including Cambodia, Laos and Vietnam. These data include illustrated descriptions of three species new for science, as well as illustrated records of 24 species new for the floras of the studied countries. When these new d...
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Three new species of Ophiopogon, O. alatus, O. erectus from N. Vietnam and O. patulus from NE. Laos, and three new species of Peliosanthes, P. inaperta from central Laos and P. kenhilloides, P. splendens from NW. Vietnam, are described with illustrations. These taxa are regarded as local endemics of the respective countries. Peliosanthes macrostegi...
Article
Five new species named Peliosanthes aperta, P. elegans, P. kenhillii, Tupistra densiflora and T. patula are described and illustrated. These species are very local in distribution and endemic to northern or southern Vietnam. Two other species, Ophiopogon ogisui and Peliosanthes griffithii, are recorded as new to the flora of Vietnam. A key to the s...
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Four new species of Begonia, namely B. abbreviata C.-I Peng, B. calciphila C.-I Peng, B. sphenantheroides C.-I Peng and B. tamdaoensis C.-I Peng are documented from northern Vietnam. Detailed descriptions, line drawings, color plates, chromo-some data, foliar SEM observations and comparisons with phenetically similar species are provided to aid in...
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The present review includes keys for identification and summary data on the nomenclature, morphology, ecology and distribution for all 33 species of gymnosperms hitherto recorded in the flora of Laos. They belong to 8 families and 15 genera. Important additions to these data were obtained during fieldwork in 2009–2013, when 58 localities containing...
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A new species Trachycarpus ravenii discovered in Kasi district, Vientiane province of central Laos is described and illustrated. Morphologically, it is closest to T. oreophilus and T. princeps, but differs by having a shorter stem of mature plants; glabrous, dull green petiole; almost circular leaf blade, waxy bluish–white abaxially; narrow leaf se...
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In our recent molecular phylogenetic study of Asian Begonia, two undescribed species, B. guixiensis sp. ined. (S. Guangxi, China) and B. longa sp. ined. (Vietnam), were sampled and placed within the strongly supported clade composed of Begonia sect. Coelocentrum and other co-distributed rhizomatous species in the Sino-Vietnamese limestone karsts. W...
Article
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In our recent molecular phylogenetic study of Asian Begonia, two undescribed species, B. guixiensis sp. ined. (S. Guangxi, China) and B. longa sp. ined. (Vietnam), were sampled and placed within the strongly supported clade composed of Begonia sect. Coelocentrum and other co-distributed rhizomatous species in the Sino-Vietnamese limestone karsts. W...

Citations

... 2022). Other species are distributed in north-eastern India, northern Vietnam, Japan, Myanmar, Bhutan and Thailand (Wang et al. 1990(Wang et al. , 1998Li and Wang 2004;Möller et al. 2017Möller et al. , 2018Xu et al. 2017;Chen et al. 2018;Wei 2018). ...
... The genus Tupistra Ker Gawl. belonging to Asparagaceae subfamily Nolinoideae (Chase et al., 2009) comprises about 31 species (Roy et al., 2017a,b;Averyanov et al., 2018;Roy and Mao 2018;Odyuo et al., 2018) in the world. It is distributed in south and south-east of continental Asia, including Nepal, Bhutan, India, Myanmar, China, Laos, Vietnam, Thailand and Malaysia (Tanaka 2003a,b;Tanaka 2010a,b;Averyanov et al., 2016). ...
... Around this small city are multiple limestone karsts that dominate the skyline in a dramatic fashion. This area is famous in Laos for its ecotourism due to its natural caves and beautiful waterfalls and, in the past decade, there have also been many new plant species described from the Vangvieng area (Averyanov & Nguyen, 2012;Averyanov & Tillich, 2015, 2016Averyanov et al., , 2017Averyanov et al., , 2019aPimenov et al., 2016;Kumar et al., 2017;Lanorsavanh et al., 2020a). ...
... For instance, H. australis Traill (1830: 28), a species formerly known from Australia, Papuasia and Melanesia (Forster & Liddle 1991;Liddle & Forster 2008) was also collected in Sulawesi and Borneo (Lamb & Rodda 2017), and H. erythrina Rintz (1978: 501), a species formerly considered endemic to Peninsular Malaysia was also collected in Thailand and Vietnam. (Averyanov et al. 2017). Hoya ischnopus is quite variable in leaf shape (lanceolate to oblong), base (acute to round or subcordate) and margins (entire to undulate). ...
... Peliosanthes Andrews (1808: t. 605) is a genus of herbaceous evergreen perennials, which inhabits tropical and subtropical forests of South, East and Southeast Asia (Jessop 1976, Averyanov et al. 2015, 2016a, Roy et al. 2017a, Nong et al. 2019, Taram et al. 2020. Govaerts et al. (2021) list 89 names of species published within this genus, of which 56 species are accepted by these authors. ...
... Govaerts et al. (2021) list 89 names of species published within this genus, of which 56 species are accepted by these authors. Investigation of the species diversity of Peliosanthes is currently especially intensive in India, Laos, Thailand and Vietnam, from where numerous species of the genus have been described during the last several years (Averyanov et al. 2016a, 2016b, 2020a, 2020b, Vislobokov 2016, Roy et al. 2017b, Tanaka 2018, Vislobokov et al. 2018, Nong et al. 2019, Tanaka & Kalyuzhny 2020, Taram et al. 2020. ...
... Meanwhile, Gru? et al. (2014), Gale et al. (2016) and Gale & Phaxaysombath (2017) each added a new species. Drawing on this relatively brief period of increasingly thorough exploratory work, a running total of 684 species belonging to 125 genera can now be confirmed in Laos (Averyanov 2013;Averyanov et al. 2014Averyanov et al. , 2016aAveryanov et al. , 2016bAveryanov et al. , 2016cAveryanov et al. , 2017Govaerts et al. 2017;Kumar et al. 2016;Pedersen 2011a;Schuiteman & Bonnet 2009Schuiteman & de Vogel 2000;Schuiteman 2013;Svengsuksa & Lamxay 2005), with nomenclature brought in line with current phylogenetic understanding of the family (Chase et al. 2015). ...
... Platycentrum were previously reported in 51 taxa, and a substantial variation has been revealed, including 2n=14, 16,18,20,22,23,24,26,32,34,38,41,44,46,52,60,64 and 82 (Heitz 1927, Sharma and Bhattacharyya 1957, 1961, Sharma 1970, Legro and Doorenbos 1969, 1971, 1973, Sarkar 1974, 1989, Peng and Chen 1990, 1991, Doorenbos et al. 1998, Peng and Chiang 2000, Peng and Sue 2000, Oginuma and Peng 2002, Tian et al. 2002, Nakata et al. 2003, 2007, Ye et al. 2004, Li et al. 2005a, b, Peng et al. 2005, 2015a, b, Peng and Ku 2009, Kono et al. 2012, Ding et al. 2014, Tseng et al. 2017. However, because the chromosomes of Begonia are small and generally shorter than 2 µm long, karyotypes of the section had only been reported for 15 species (Oginuma and Peng 2002, 2015b. Together with 2n=28 (56), 38 Doorenbos 1969, 1971), and 30 (Kono et al. 2021a), 2n=22 is one of the most common chromosome numbers reported in Begonia. ...
... The results of studies of karyotype variation across this phylogeny can be used to reveal patterns of chromosome dynamics in this genus. Chromosome number variation in Begonia has been studied previously (Legro & Haegeman, 1971;Forrest, 2000;Hong-Zhe et al., 2005a;Dewitte et al., 2009;Hughes et al., 2011;Peng et al., 2014aPeng et al., , 2014b. However, most of this research focused on exploring karyotype compatibility of commercial hybrids and on species descriptions. ...
... Pinus latteri (Tenasserim pine) is widely distributed in Southeast Asia and is considered as one of the most important tree species with respect to the reforestation of watershed areas and forest conservation [29]. In Thailand, natural P. latteri forests are mainly distributed in the mountainous areas in north and west Thailand. ...