Begonia wui-senioris (sect. Platycentrum, Begoniaceae), a new species from Myanmar

Peng, Ching‐I; Hong, Wang; Kono, Yoshiaki; Yang, Hsun-An

doi:10.1186/1999-3110-55-13

Cited by 24 publications

(30 citation statements)

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“…Shui) to the island, were documented (Gu et al [2007]). In continuation of our studies of Asian Begonia (e.g., Chung et al, [2014]; Hughes et al [2011]; Nakamura et al [2013]; Peng et al [2012][2013][2014]; Rubite et al: Begonia chingipengii [sect. Baryandra , Begoniaceae], a new species from Luzon Island, Philippines, submitted), we report the discovery of an additional undescribed species, B. wuzhishanensis , endemic to the island.…”

Section: Introductionsupporting

confidence: 72%

Begonia wuzhishanensis (sect. Diploclinium, Begoniaceae), a new species from Hainan Island, China

Peng

Jin

et al. 2014

Bot Stud

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BackgroundHainan is the largest island of the Indo-Burma Biodiversity Hotspot and has the best preserved and most extensive tropical forests in China. A recent study on distribution of endangered species in China identifies southern Hainan as one of eight hotspots for plant conservation in the country. In continuation of our studies of Asian Begonia, we report the discovery of an attractive undescribed species, B. wuzhishanensis C.-I Peng, X.H. Jin & S.M. Ku, from Hainan Island.ResultsLiving plant of the new species, Begonia wuzhishanensis, was collected in 2009 and cultivated in the experimental greenhouse for morphological and cytological studies. It flowered consecutively in 2012 and 2013 in the experimental greenhouse, Academia Sinica. It was assigned to the large, heterogeneous sect. Diploclinium. The chromosome number of this new species was determined to be 2n = 26.ConclusionsA careful study of literature, herbarium specimens and living plants, both in the wild and in cultivation, support the recognition of the new species Begonia wuzhishanensis, which is described in this paper. Begonia wuzhishanensis is currently known only from Fanyang, Wuzhishan Mountain in the center of the island. A line drawing, color plate, and a distribution map are provided to aid in identification.Electronic supplementary materialThe online version of this article (doi:10.1186/1999-3110-55-24) contains supplementary material, which is available to authorized users.

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Section: Introductionsupporting

confidence: 72%

Begonia wuzhishanensis (sect. Diploclinium, Begoniaceae), a new species from Hainan Island, China

Peng

Jin

et al. 2014

Bot Stud

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“…Based on recent treatment of Begoniaceae in the Flora of China (Gu et al2007) and subsequent studies (Liu et al2007; Peng et al20072008a,b20122013; Li et al2008; Shui2007; Wei et al2007), ca. 170 species of Begonia assigned to 9 (Shui et al2002) or 7 (Gu2007) sections are currently known from continental China, with sect.…”

Section: Introductionmentioning

confidence: 99%

“…Among these, ca. 60 species (35% of the Begonia diversity in China) are known primarily from limestone substrates in Guangdong (1 species), Guangxi (44 species), Guizhou (3 species) and Yunnan (19 species) provinces (Gu et al2007; Liu et al2007; Peng et al20072008a,b201020122013). These limestone begonias include one species of sect.…”

Section: Introductionmentioning

confidence: 99%

“…Coelocentrum is one of the most characteristic limestone plants confined to cave-like microhabitats (i.e., caves, crevices, and fissures) of the Sino-Vietnamese karst region (Peng et al2008a; Qin and Liu2010), with most species known from a single or a few localities and differing from one another by leaf shape, pubescence, texture, and variegation (Gu et al2007). In the past decade, explorations and taxonomic studies in the region have more than tripled the number of species in this section from 15 (Ku1999) to over 50 (Gu et al2007;Liu et al2007; Ku et al2008; Peng et al20072008a,b20122013; Averyanov and Nguyen2012;), representing a remarkable example of species radiations across the Sino-Vietnamese limestone karsts comparable to those on oceanic islands and tropical high mountains (Rundell and Price2009). …”

Section: Introductionmentioning

confidence: 99%

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Phylogenetic analyses of Begonia sect. Coelocentrum and allied limestone species of China shed light on the evolution of Sino-Vietnamese karst flora

et al. 2014

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BackgroundThe picturesque limestone karsts across the Sino-Vietnamese border are renowned biodiversity hotspot, distinguished for extremely high endemism of calciphilous plants restricted to caves and cave-like microhabitats that have functioned as biological refugia on the otherwise harsh habitats. To understand evolutionary mechanisms underlying the splendid limestone flora, dated phylogeny is reconstructed for Asian Begonia, a species-rich genus on limestone substrates represented by no less than 60 species in southern China, using DNA sequences of nrITS and chloroplast rpL16 intron. The sampling includes 94 Begonia species encompassing most major Asian clades with a special emphasized on Chinese species.ResultsExcept for two tuberous deciduous species and a species with upright stems, a majority of Sino-Vietnamese limestone Begonia (SVLB), including sect. Coelocentrum (19 species sampled) and five species of sect. Diploclinium, Leprosae, and Petermannia, are rhizomatous and grouped in a strongly supported and yet internally poorly resolved clade (Clade SVLB), suggesting a single evolutionary origin of the adaptation to limestone substrates by rhizomatous species, subsequent species radiation, and a strong tendency to retain their ancestral niche. Divergence-time estimates indicate a late Miocene diversification of Clade SVLB, coinciding with the onset of the East Asian monsoon and the period of extensive karstification in the area.ConclusionsBased on our phylogenetic study, Begonia sect. Coelocentrum is recircumscribed and expanded to include other members of the Clade SVLB (sect. Diploclinium: B. cavaleriei, B. pulvinifera, and B. wangii; sect. Leprosae: B. cylindrica and B. leprosa; sect. Petermannia: B. sinofloribunda). Because species of Clade SVLB have strong niche conservatism to retain in their ancestral habitats in cave-like microhabitats and Begonia are generally poor dispersers prone to diversify allopatrically, we propose that extensive and continuous karstification of the Sino-Vietnamese limestone region facilitated by the onset of East Asian monsoon since the late Miocene has been the major driving force for species accumulation via geographic isolation in Clade SVLB. Morphologically species of Clade SVLB differ mainly in vegetative traits without apparent adaptive value, suggesting that limestone Begonia radiation is better characterized as non-adaptive, an underappreciated speciation mode crucial for rapid species accumulations in organisms of low vagility and strong niche conservatism.Electronic supplementary materialThe online version of this article (doi:10.1186/1999-3110-55-1) contains supplementary material, which is available to authorized users.

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“…Numerous new taxa have been described from there in recent years, especially from the limestone areas, e.g. Aspidistra : Hou et al, 2009, Lin et al, 2010, Liu et al, 2011, 2013; Begonia : Fang et al, 2006, Ku et al, 2006, 2008, Liu et al, 2005, 2007, Peng et al, 2005a, b, 2006, 2007, 2008a, b, 2010, 2012; Primulina : Xu et al, 2012, 2013; Oreocharis : Liu et al, 2012; Polystichum : He and Zhang 2011, Zhang and He, 2009a, b, Zhang et al, 2010. In continuation of our studies of Chinese Begonia , we report the discovery of two additional new species, B. longgangensis and B. ferox , from limestone karsts in southwestern Guangxi.…”

Section: Introductionmentioning

confidence: 99%

Novelties in Begonia sect. Coelocentrum: B. longgangensis and B. ferox from limestone areas in Guangxi, China

et al. 2013

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BackgroundThe spectacular karst limestone landscape in Guangxi harbors high-level diversity and endemism of Begonia species, especially those of sect. Coelocentrum. In continuation of our studies in this area, we report the discovery of two attractive new species from southwestern Guangxi: Begonia longgangensis and B. ferox.ResultsBegonia longgangensis resembles B. liuyanii, also from Longgang Nature Reserve, in the broadly ovate to suborbicular leaf blade, differing by the much smaller leaves, subglabrous leaf surface, pink flowers, dichasial cymes and the remarkably long stolons sent out from rhizomes. Unexpectedly, both diploid (2n = 30) and triploid counts (2n = 45) were observed in plants collected from the type locality. Begonia ferox probably has the most prominent bullate leaves for the genus. In this aspect, it is similar to B. nahangensis reported from northern Vietnam recently, but is readily distinguishable by the ovate, chartaceous leaves with an acuminate apex; tomentose peduncle not exceeding petioles; and the much larger stature in vegetative parts. A diploid count of 2n = 30 was determined for this unique new species.ConclusionsAll available data support the recognition of the two new species. Begonia longgangensis has remarkably long stolons and B. ferox is characterized by the prominent bullate leaves. Line drawings, color plates and comparisons are provided to aid in identification of the novelties.Electronic supplementary materialThe online version of this article (doi:10.1186/1999-3110-54-44) contains supplementary material, which is available to authorized users.

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Begonia wui-senioris (sect. Platycentrum, Begoniaceae), a new species from Myanmar

Cited by 24 publications

References 2 publications

Begonia wuzhishanensis (sect. Diploclinium, Begoniaceae), a new species from Hainan Island, China

Begonia wuzhishanensis (sect. Diploclinium, Begoniaceae), a new species from Hainan Island, China

Phylogenetic analyses of Begonia sect. Coelocentrum and allied limestone species of China shed light on the evolution of Sino-Vietnamese karst flora

Novelties in Begonia sect. Coelocentrum: B. longgangensis and B. ferox from limestone areas in Guangxi, China

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