Ptilagrostis contracta (Stipeae, Poaceae), a New Species Endemic to Qinghai-Tibet Plateau

Zhang, Zhongshuai; Li, Linglu; Chen, Wenli

doi:10.1371/journal.pone.0166603

Cited by 6 publications

(1 citation statement)

References 19 publications

(21 reference statements)

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“…Recent examples include one new species of Achnatherum Beauv., two new species of Deyeuxia , two new species of Ptilagrostis Griseb. and two new species of Stipa L. ( Paszko and Chen 2013 ; Paszko and Pendry 2013 ; Nobis et al 2016 ; Zhang et al 2016 , 2017 , 2018 ; Zhao and Guo 2017 ; Cai et al 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Calamagrostis hongii (Poaceae, Agrostidinae), a new species from southwestern China

Liu

Paszko

2020

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Calamagrostis hongii, a new species of Calamagrostis (Poaceae) from southwestern China (S Chongqing, W Guizhou, Sichuan, SE Xizang, Yunnan), is here described and illustrated. It is similar to C. arundinacea and C. effusiflora in spikelet traits, but can be distinguished by its moderately or densely scabrous upper leaf surface with ribs covered by short, stiff, prickle hairs, and glabrous leaf sheaths, blades and collars. Nomenclature Deyeuxia zhongdianensis lacks Latin description or diagnosis and is an unavailable nomen nudum (naked name).

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Section: Introductionmentioning

confidence: 99%

Calamagrostis hongii (Poaceae, Agrostidinae), a new species from southwestern China

Liu

Paszko

2020

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Species delimitation and taxonomic revision of the Ptilagrostis dichotoma species complex (Poaceae) based on statistical morphological variations

Zhang,

Chen

2024

Botanical Journal of the Linnean Society

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Statistical morphological variations at the population level serve as a robust foundation for species delimitation and taxonomic treatment. We employed this approach to investigate species delimitation within the Ptilagrostis dichotoma species complex (Poaceae), which is characterized by open panicles. While three species have been described, the boundaries between these species and the morphological distributions of all taxonomic traits remain unclear. In this study, we examined the geographical variability of 19 morphological traits based on at least six individuals from each of the 28 populations across the entire distributional range of the species complex. Our statistical analyses identified five distinct phenotypic clusters with specific geographical preferences. Three of these clusters corresponded to the previously described species, while the remaining two clusters represented previously undescribed species. Furthermore, our findings highlight several traits, such as basal leaf scabrosity, panicle branch pulvinae, and glume length, which exhibit distinct gaps between phenotypic units and prove highly valuable for species delimitation. Finally, two new species are described and a key is provided to differentiate the five species. This morphological revision establishes a basis for future studies on species boundaries and divergences of the complex based on other evidence.

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The cytotaxonomy of Piptatherum kuoi (Stipeae, Poaceae)

Zhang

Chen

2018

Nordic Journal of Botany

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The generic placement of Piptatherum kuoi (Poaceae, Stipeae) has long been controversial. Recent molecular phylogenetic analyses indicate that Piptatherum kuoi should be transferred to Patis. Here, we present cytological support for this transfer and discuss morphological differences and similarities. Piptatherum kuoi has a chromosome number of 2n = 46 with the chromosomes varying in length between 1.1 and 3.1 μm, and the symmetrical karyotype 2n = 26m + 16sm + 4st (2sat). Karyological characters of Piptatherum kuoi, including chromosome number, size, and karyotype asymmetry, thus all agree with those of species of Patis, but are different from those of other species of Piptatherum. The transfer of Piptatherum kuoi to Patis is thus corroborated.

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Ptilagrostis contracta (Stipeae, Poaceae), a New Species Endemic to Qinghai-Tibet Plateau

Cited by 6 publications

References 19 publications

Calamagrostis hongii (Poaceae, Agrostidinae), a new species from southwestern China

Calamagrostis hongii (Poaceae, Agrostidinae), a new species from southwestern China

Species delimitation and taxonomic revision of the Ptilagrostis dichotoma species complex (Poaceae) based on statistical morphological variations

The cytotaxonomy of Piptatherum kuoi (Stipeae, Poaceae)

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