Synopsis of the tribe Stipeae (Poaceae) in Nepal

Abstract

In Nepal the Stipeae consists of six genera: Achnatherum, Orthoraphium, Piptatherum, Ptilagrostis, Stipa, Trikeraia, and 15 species. Two new combinations, Ptilagrostis duthiei (Hook. f.) M.Nobis & P.D.Gudkova and Achnatherum staintonii (Bor) M.Nobis & P.D.Gudkova, are proposed, and new country records for Stipa klimesii, Ptilagrostis dichotoma, Ptilagrostis concinna and Achnatherum jacquemontii are reported. The records of Stipa roborowskyi, S. przewalskyi, S. capillata, S. consanguinea, S. mongholica, and S. sibirica, previously thought to occur in Nepal were based on misidentifications, and these have been excluded from the list of Nepalese Stipeae. We present keys for the identification of genera and species, and a checklist including information on nomenclatural types, regional and national distribution, and habitat. A lectotype is designated for Stipa brandisii Mez.

A Synopsis of the Genus Stipa (Poaceae) in Middle Asia, Including a Key to Species Identification, an Annotated Checklist, and Phytogeographic Analyses

“…Stipa species have lemmas characterized by the presence of rectangular to square fundamental (long) cells, with numerous hooks and sparse, reniform to oblong silica bodies sometimes associated with cork cells. Hooks are distributed on short cells along the entire upper surface of the lemma (Barkworth & Everett, 1987;Romaschenko et al, 2012;Nobis et al, 2016aNobis et al, , 2019aNobis et al, , 2019bOlonova et al, 2016). This pattern of lemma epidermis has been called saw-like, in contrast to maize-like, which is characterized by short fundamental cells and extremely numerous silica bodies on the upper surface of the lemma, typical for achnatheroid grasses represented by e.g., Achnatherum, Aristella, or Stipellula (Romaschenko et al, 2012).…”

“…This pattern of lemma epidermis has been called saw-like, in contrast to maize-like, which is characterized by short fundamental cells and extremely numerous silica bodies on the upper surface of the lemma, typical for achnatheroid grasses represented by e.g., Achnatherum, Aristella, or Stipellula (Romaschenko et al, 2012). The third type of lemma epidermis pattern encountered in Stipeae and observed in Neotrinia, Orthoraphium, Piptatherum, Psammochloa, Ptilagrostis, and Trikeraia is characterized by elongate fundamental (long) cells that vary in shape, from rectangular to elongated with straight or sinuous edges, more or less numerous silica bodies associated with cork cells, and sparse or absent hooks (Romaschenko et al, 2012(Romaschenko et al, , 2014Nobis et al, 2019aNobis et al, , 2019b. Some authors have proved that although the general pattern of the lemma epidermis in species of Stipa is relatively uniform, it may be useful in the identification of particular species within and/or between different generic sections (Nobis, , 2014Nobis et al, 2014bNobis et al, , 2015bNobis et al, , 2016aOlonova et al, 2016).…”

New national and regional plant records: Contribution to the flora of the Old World countries

“…ese changes are reflected in the progressing decline of the species sensitive to environmental changes as well as in the spread of invasive alien species, negatively affecting natural ecosystems and their services important for human well-being. Information on the occurrence of species in areas previously not occupied by them, unnoticed or misidentified with other species, is of great interest and continues to be published (e.g., Bulakh et al, 2022;Dudáš et al, 2022;Ellis et al, 2022;Nobis et al, 2019b;Raab-Straube von & Raus, 2022;Tlałka et al, 2021;Verkhozina et al, 2022) since each new floristic record broadens our knowledge of the species spatiotemporal dynamics and contributes to more effective management of natural resources. is paper is a continuation of the previous works (e.g., Nobis et al, 2014Nobis et al, , 2018Nobis et al, , 2019bNobis et al, , 2019c and is dedicated to new findings on the distribution and taxonomy of vascular plants, or simpler, to plants new to the flora of selected countries (or their significant regions) in the Old Word (including Europe, Asia, and Africa).…”

“…Information on the occurrence of species in areas previously not occupied by them, unnoticed or misidentified with other species, is of great interest and continues to be published (e.g., Bulakh et al, 2022;Dudáš et al, 2022;Ellis et al, 2022;Nobis et al, 2019b;Raab-Straube von & Raus, 2022;Tlałka et al, 2021;Verkhozina et al, 2022) since each new floristic record broadens our knowledge of the species spatiotemporal dynamics and contributes to more effective management of natural resources. is paper is a continuation of the previous works (e.g., Nobis et al, 2014Nobis et al, , 2018Nobis et al, , 2019bNobis et al, , 2019c and is dedicated to new findings on the distribution and taxonomy of vascular plants, or simpler, to plants new to the flora of selected countries (or their significant regions) in the Old Word (including Europe, Asia, and Africa). Here, we present the data on 16 species that are newly reported as components of the flora of five countries or their significant regions (provinces or republics) -five taxa are given for the first time from Poland, and one is rediscovered and thus reassessed, five are new records to Tajikistan, three to Kyrgyzstan, one to Turkey, one to China and one to the Gansu Province in China.…”