A new genus of temperate woody bamboos (Poaceae, Bambusoideae, Arundinarieae) from a limestone montane area of China

Abstract

Ampelocalamuscalcareus is a climbing and slender bamboo, known from south Guizhou, China. This species grows in broadleaved forests of limestone montane areas. Recent molecular phylogenetic analyses demonstrated that A.calcareus was sister to all other lineages of the tribe Arundinarieae rather than a member of Ampelocalamus. The morphological features and habitats of A.calcareus and related genera including Ampelocalamus, Drepanostachyum and Himalayacalamus were compared and discussed. The characteristics of the branch complements, nodes and foliage leaves distinguish A.calcareus from morphologically similar taxa. On the basis of molecular and morphological evidence, we propose to establish a new genus, Hsuehochloa, to accommodate A.calcareus and to honour the late Chinese bamboo taxonomist Chi-Ju Hsueh (Ji-Ru Xue). In addition, we describe the inflorescence of Hsuehochloa for the first time.

Parallel ddRAD and Genome Skimming Analyses Reveal a Radiative and Reticulate Evolutionary History of the Temperate Bamboos

“…For ddRAD, we sampled a total of 213 taxa in 200 species from 32 genera representing 36% of species and 97% of genera ( Soreng et al 2015 ; Zhang et al 2018 ; Zhang et al 2020 ) and all 12 clades in Arundinarieae. Two paleotropical woody bamboos and three neotropical woody bamboos were selected as outgroups.…”

“…The entire tribe originated from an ancient allopolyploid event around 22 Ma, and due to the extinction of diploid progenitors (CC and DD), all extant species are now allotetraploids with base chromosome number \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} }{}$x = 12$\end{document} (CCDD, 2 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} }{}$n=$\end{document} 4X \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} }{}$= 48$\end{document} ) ( Guo et al 2019 ). The clade has experienced a rapid radiation ( Hodkinson et al 2010 ; Zhang et al 2016 ) and now comprises approximately 550 species across 33 genera ( Clark et al 2015 ; Soreng et al 2015 ; Zhang et al 2018 ). This diversity is unevenly distributed globally, with over 95% of species endemic to East Asia, and the remaining 20 species distributed in Sri Lanka, southern India, Madagascar, and Africa, with only three species in eastern North America ( BPG 2012 ).…”

“…Previous phylogenomic studies in Arundinarieae conflict in many major ways but agree in several interesting respects as well. For example, the newly described genus Hsuehochloa ( Zhang et al 2018 ) was consistently found as sister to the rest of Arundinarieae ( Yang et al 2013 ; Ma et al 2014 ). Examples of conflict include nuclear support for the establishment of an early-diverging lineage of Ampelocalamus \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} }{}$+$\end{document} Drepanostachyum \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{upgreek} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} }{}$+$\end{document} Himalayacalamus (ADH) ( Yang et al 2013 ), which also shares morphological and biogeographic affinity ( Li et al 1996 ), but was not supported in chloroplast phylogenies ( Ma et al 2014 ).…”

Straight From the Plastome: Molecular Phylogeny and Morphological Evolution of Fargesia (Bambusoideae: Poaceae)

“…However, Yi (1983a) considered that other alpine bamboo species which have the inflorescences subtending by a series of expanded leaf sheaths in varying degree should be added in Fargesia . Therefore, Yi (1983a,b,c, 1985a,b,c, 1986, 1988a,b, 1989, 1990, 1991a,b, 1992a,b, 2000a,b,c) and others (Lu, 1981; Wang and Ye, 1981; Wen, 1984, 1989; Keng, 1987; Yi and Shao, 1987; Yi and Long, 1989; Yi et al, 2005, 2006, 2007a,b, 2008; Yi and Zhu, 2012; Yang and Yi, 2013) published ca. 100 new species of Fargesia .…”

Schizostachyum dakrongense (Poaceae, Bambusoideae), a new species from Dakrong Nature Reserve, Vietnam

“…There are only two genera belonging to Arundinarieae in subtropical Asia, i.e. Ampelocalamus S. L. Chen, T. H. Wen & G. Y. Sheng and Hsuehochloa D. Z. Li & Y. X. Zhang, which have a combination of morphological characters including scandent stems, semelauctant inflorescences, three stamens and two stigmas (Chen et al 1981;Zhang et al 2018). However, this unknown bamboo has some both reproductive and vegetative characters that are different from these two subtropical genera (see Table 1).…”