Aristolochia gongchengensis(Aristolochiaceae), a New Species from the Limestone Areas in Guangxi, China

Taxonomic studies on the genus Isotrema (Aristolochiaceae) from China: II. I. brevilimbum (Aristolochiaceae), a new species from Guizhou, China

“…It can be distinguished from Aristolochia by the follow-ing set of characters: perianth strongly curved, gynostemium 3-lobed, anthers paired on the outer surface of each gynostemium segment, and capsule dehiscing basipetally (Do et al 2015a;Zhu et al 2019a). Several new species of Isotrema have been found and described from China and its neighbouring countries during recent years (Liu and Deng 2009;Xu et al 2011;Yao 2012;Huang et al 2013Huang et al , 2015Wu et al 2013Wu et al , 2015Do et al 2014Do et al , 2015aDo et al , 2015bDo et al , 2015cDo et al , 2015dDo et al , 2016Do et al , 2019Huong et al 2014;Lu and Wang 2014;Ohi-Toma et al 2014;Zhu et al 2015Zhu et al , 2016Zhu et al , 2017aZhu et al , 2017bZhu et al , 2018Zhu et al , 2019bZhu et al , 2019cGong et al 2018;Yang et al 2018;Li et al 2019;Peng et al 2019;Zhou et al 2019;Cai et al 2020aCai et al , 2020b. Currently, a total of 106 species have been reported from Isotrema, most of which are distributed in eastern and southern Asia, with some species further extended to northern and central America (Zhu et al 2019a).…”

Isotrema sanyaense, a new species of Aristolochiaceae from Hainan, China

“…Isotrema sanyaense can also be easily distinguished from I. jianfenglingense by the inflorescence (cymes 1–5-flowered, in hanging clusters of 1 to numerous branches vs. solitary), the calyx (white with purple-red stripes vs. light red to brown without stripes), the calyx limb (discoid, yellow, with purple-red stripes and spots, lobes without papillae and pubescent vs. trumpet-shaped, pink, without stripes and spots, lobes densely papillae and pubescent), and the throat (dark red without spots, significantly smaller than the limb width vs. pink with red-brown spots, approximately to the limb width) (summarized in Table 1). Considering the discovery of this new species from Hainan island, along with the species previously described in China, Myanmar, Peninsular Malaysia, Thailand and Vietnam in recent years (González and Poncy 1999, Phuphathanaphong 2006, Hansen and Phuphathanaphong 2009, Liu and Deng 2009, Xu et al 2011, Yao 2012, Huang et al 2013, 2015, Wu et al 2013, 2015, Do et al 2014, 2015a, 2015b, 2015c, 2015d, 2017, 2019, Huong et al 2014, Lu and Wang 2014, Ohi-Toma et al 2014, Ravikumar et al 2014, Zhu et al 2015, 2016, 2017a, 2017b, 2018, Gong et al 2018, Yang et al 2018, Zhou et al 2019), we predict that more and more new species of Isotrema will be found after extensive investigations and studies.…”

Aristolochia yachangensis, a new species of Aristolochiaceae from limestone areas in Guangxi, China

“…Currently, there are more than 70 species of Aristolochia known from China, including many new species that have been described from Yunnan, Guangxi, Guangdong, Zhejiang and Hainan in recent years (Gong et al 2018;Zhu et al 2018Zhu et al , 2019bZhu et al , 2019dLi et al 2019;Peng et al 2019;Zhou et al 2019). As one of the most biodiverse regions of China, Guangxi has 22 Aristolochia species (Peng et al 2019;Zhu et al 2019c), including A. bambusifolia C.F.Liang ex H.Q.Wen, A. longlinensis Yan Liu & L. Wu and A. gongchengensis,Y.S.Huang, Y.D.Peng & C.R.Lin, which are endemic in the region (Qin and Liu 2010;Huang et al 2015;Wu et al 2015) During a fieldwork in Yachang Orchid National Nature Reserve of north-western Guangxi, China in April 2019, we discovered a special flowering plant of Aristolochiaceae and speculated that it might be a new species of Aristolochia, based on its flower structure. We investigated this species at the same location again and collected specimens of young capsules in May 2019.…”

“…In order to obtain more detailed morphological data, we came back to the same location once again and collected specimens of mature capsules in July 2019. After consulting Flora of China (Hwang et al 2003) and other relevant literature (Merrill and Chun 1940;Liang 1975;Chow and Huang 1975;Hwang 1981;Cheng et al 1988;Ma 1989aMa , 1989bMa and Cheng 1989;Wen 1992;Liu and Deng 2009;Xu et al 2011;Huang et al 2013Huang et al , 2015Wu et al 2013Wu et al , 2015Do et al 2014Do et al , 2015aDo et al , 2015bDo et al , 2016Do et al , 2019Huong et al 2014;Zhu et al 2015Zhu et al , 2016Zhu et al , 2017aZhu et al , 2017bZhu et al , 2018Zhu et al , 2019bZhu et al , 2019dDo and Nghiem 2017;Gong et al 2018;Li et al 2019;Peng et al 2019;Zhou et al 2019;Cai et al 2020), as well as comparisons amongst this unknown species and its morphologically most similar species, we confirmed that this species was clearly different from the known Aristolochia species. Hence, it is here described and illustrated as a new species.…”

“… longlinensis Yan Liu & L.Wu and A. gongchengensis ,Y.S.Huang, Y.D.Peng & C.R.Lin, which are endemic in the region ( Qin and Liu 2010 ; Huang et al 2015 ; Wu et al 2015 )…”