Carex concava (Carex sect. Rhomboidales, Cyperaceae), a new species from Hainan, China

Abstract

A new species of Carex sect. Rhomboidales, Carex concava, is described and illustrated from Hainan, China. The new species is similar to C. paracheniana but differs in having wider blades and longer sheaths of bracts; inflorescence with 3 spikes; terminal spike 2-6 cm long and with a 4-14 cm long peduncle; lateral spikes 3-6 cm long, loosely flowered and with 8-15 cm long peduncles; staminate glume ovate, 1-veined costa excurrent into a shortly awn ca. 0.3 mm; pistillate glume ovate, ca. 4 mm long, 1-veined costa excurrent into a awn ca. 1 mm; perigynia fusiform and green; nutlets inclined-oval, brownish black, with 3 angles deeply constricted at the middle and the side toward of spike-stalk deeply concave at base.

Carex qingyuanensis (Cyperaceae), a new species from Guangdong, China

“…Since then, nearly 40 new species and two subspecies have been described from China (Jin et al 2004;Song et al 2008;Jin 2009;Su 2009aSu , 2009bWeng et al 2009;Jin and Zheng. 2010;Jin et al 2011Jin et al , 2012aJin et al , 2012bZhao et al 2011;Wang et al 2012;Yu et al 2012;Deng 2014;Yang et al 2014;Jin and Chen 2015;Yang et al 2015aYang et al , 2015bYang et al 2016;Jin 2017;Yang et al 2017;Lu and Jin 2018;Zhang et al 2018;Lu et al 2020;Yang and Liu 2020;Zhang et al 2021;Li et al 2022;. The new species were mainly discovered in the Provinces of Zhejiang, Guangxi and Anhui.…”

<p><strong><em>Carex ledongensis </em>(Cyperaceae), a new sedge from Hainan Isl. Of South China</strong></p>

“…ruianensis (Song et al 2008); C. yunyiana (Jin 2009); C. datongensis (Su 2009a); C. incisa subsp. longissima (Su 2009a); C. kuniuensis (Su 2009a); C. langyaensis (Su 2009a); C. kobresiiformis (Su 2009b); C. qingliangensis (Weng et al 2009); C. yandangshanica (Jin et al 2010); C. dapanshanica (Zhao et al 2011); C. zhejiangensis (Jin et al 2011); C. tenuirostrata (Jin et al 2012a); C. paracheniana (Jin et al 2012b); C. longipetiolata (Wang et al 2012); C. trongii (Yu et al 2012); C. longicolla (Deng 2014); C. diaoluoshanica (Yang et al 2014); C. huangshanica (Chen & Jin 2015); C. procumbens (Yang et al 2015a), C. jianfengensis (Yang et al 2015b); C. concava (Yang et al 2016); C. chungii (Jin 2017), C. xueyingiana (Yang 2017); C. honglinii, C. subglabra (Lu & Jin 2018).…”

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“…ruianensis (Song et al 2008); C. yunyiana (Jin 2009); C. datongensis (Su 2009a); C. incisa subsp. longissima (Su 2009a); C. kuniuensis (Su 2009a); C. langyaensis (Su 2009a); C. kobresiiformis (Su 2009b); C. qingliangensis (Weng et al 2009); C. yandangshanica (Jin et al 2010); C. dapanshanica (Zhao et al 2011); C. zhejiangensis (Jin et al 2011); C. tenuirostrata (Jin et al 2012a); C. paracheniana (Jin et al 2012b); C. longipetiolata (Wang et al 2012); C. trongii (Yu et al 2012); C. longicolla (Deng 2014); C. diaoluoshanica (Yang et al 2014); C. huangshanica (Chen & Jin 2015); C. procumbens (Yang et al 2015a), C. jianfengensis (Yang et al 2015b); C. concava (Yang et al 2016); C. chungii (Jin 2017), C. xueyingiana (Yang 2017); C. honglinii, C. subglabra (Lu & Jin 2018).…”

“…Hainan Island is located at the southern part of China, at the northern edge of tropical Asia. During botanical explorations in Hainan Island, seven new Carex taxa have been discovered and described (Yang et al 2014(Yang et al , 2015a(Yang et al , 2015b(Yang et al , 2016Wang 2012;Deng 2014;Yang et al 2017). Recently, during an investigation of the flora of Jianfeng Ling Nature Reserve, Ledong Xian in 2019, a novel species of Carex was collected.…”