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

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)

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

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)

Deyeuxia sorengii sp nov ( Poaceae, Agrostidinae) from the Qinghai-Tibetan Plateau

Deyeuxia sorengii B. Paszko & W. L. Chen, a new species of Deyeuxia from the Qinghai-Tibetan Plateau, China, is described and illustrated. The new species is morphologically similar to D. zangxiensis P. C. Kuo & S. L. Lu, but differs from it by having a well-developed and conspicuously hairy rachilla prolongation and a straight awn. Deyeuxia sorengii occurs in alpine meadows of central Xizang and central Qinghai. The first records of Deyeuxia zangxiensis are reported from western and eastern Xinjiang and northeastern Qinghai (China)

The hybrid origin of Calamagrostis ×gracilescens (Poaceae) in Poland inferred from morphology and AFLP data

The morphology of Calamagrostis canescens and C. stricta recorded in the Małopolska Upland (the vicinity of Zbijów Mały, ca. 10 km northeast of the town of Skarżysko-Kamienna, Central Poland) was examined due to intermediate individuals found in sympatric populations of these species. Both putative parents as well as individuals that appeared hybrid-like were found in an extensive, wet hay-meadow. Various vegetative and reproductive characteristics were studied to identify hybrids. Interestingly, Polish accessions of C. ×gracilescens exhibited some degree of morphological intermediacy but resembled C. stricta in spikelet morphology. Branching of the mid-culm, the number of nodes per culm, callus hair length and relative callus hair length are the best characters to distinguish the Polish C. ×gracilescens. AFLP analysis proved to be suitable for detecting recent hybridization events between C. canescens and C. stricta. Analysis of the Bayesian clustering analysis showed that C. ×gracilescens were subjected to gene flow from the C. canescens gene pool as well as from the C. stricta gene pool

Confirmation of Calamagrostis salina in China, previously misidentified as C. macilenta, and notes about C. kokonorica and C. macilenta (Poaceae, Agrostidinae)

New data on the taxonomy and distribution of three Calamagrostis (including Euroasian Deyeuxia) species (C. kokonorica, C. macilenta, and C. salina) in northwestern and northern China are discussed. Studies were undertaken on the morphological characters to establish relatedness or not of species, and identify characters of diagnostic importance. Chinese herbarium specimens of C. salina previously have been misidentified as Deyeuxia macilenta (= C. macilenta). All available for study Chinese specimens referred to this species should be identified as C. salina. Calamagrostis salina significantly differs from C. kokonorica and C. macilenta by the palea length, relative lengths of palea and lemma, and anther length. Calamagrostis salina is confirmed for Xinjiang, and reported for the first time from Gansu, Nei Mongol and Qinghai. Calamagrostis kokonorica is confirmed for Gansu and Qinghai. The presence of C. macilenta in China is in need of further confirmation. A revised key for C. salina and related species are provided. The descriptions of all taxa are accompanied by information on their geographical distribution in China and adjacent countries

Deyeuxia debilis (Poaceae, Agrostidinae): typification, taxonomy and update of the Chinese distribution

FIGURE 5. Distribution of Deyeuxia debilis in the Gaoligong Shan region, China, marked in grey.Published as part of Paszko, Beata, Chen, Wen-Li & Szczepaniak, Magdalena, 2013, Deyeuxia debilis (Poaceae, Agrostidinae): typification, taxonomy and update of the Chinese distribution, pp. 1-10 in Phytotaxa 135 (1) on page 7, DOI: 10.11646/phytotaxa.135.1.1, http://zenodo.org/record/508611

Deyeuxia debilis (Poaceae, Agrostidinae): typification, taxonomy and update of the Chinese distribution

The name Deyeuxia debilis (Poaceae, Agrostidinae), based on Calamagrostis debilis, is lectotypified by a specimen originating from India (Sikkim, Chola) in accordance with the original description and with the current use of the name by the majority of Indian and Chinese authors. The taxonomy of the species is clarified and discussed, especially in relation to the similar Deyeuxia moupinensis and D. gaoligongensis. An amended circumscription of D. debilis is given, together with an illustration of the spikelet and culm morphology. The distribution area of D. debilis includes India and China. The range of this species in China is extended as it is recorded for the first time from the Gaoligong Shan region of NW Yunnan, SW China. A key to distinguish D. debilis, D. gaoligongensis and D. moupinensis is provided

Confirmation of Calamagrostis salina in China, previously misidentified as C. macilenta, and notes about C. kokonorica and C. macilenta (Poaceae, Agrostidinae)

New data on the taxonomy and distribution of three Calamagrostis (including Euroasian Deyeuxia) species (C. kokonorica, C. macilenta, and C. salina) in northwestern and northern China are discussed. Studies were undertaken on the morphological characters to establish relatedness or not of species, and identify characters of diagnostic importance. Chinese herbarium specimens of C. salina previously have been misidentified as Deyeuxia macilenta (= C. macilenta). All available for study Chinese specimens referred to this species should be identified as C. salina. Calamagrostis salina significantly differs from C. kokonorica and C. macilenta by the palea length, relative lengths of palea and lemma, and anther length. Calamagrostis salina is confirmed for Xinjiang, and reported for the first time from Gansu, Nei Mongol and Qinghai. Calamagrostis kokonorica is confirmed for Gansu and Qinghai. The presence of C. macilenta in China is in need of further confirmation. A revised key for C. salina and related species are provided. The descriptions of all taxa are accompanied by information on their geographical distribution in China and adjacent countries