Krzempek Marta, Klichowska Ewelina, Nobis Marcin
Institute of Botany, Faculty of Biology, Jagiellonian University, Gronostajowa 3, Kraków 30-387, Poland Jagiellonian University Kraków Poland.
PhytoKeys. 2024 Nov 15;249:115-180. doi: 10.3897/phytokeys.249.128729. eCollection 2024.
(false needlegrass) is a genus of high-mountain grasses distributed in Central and North-East Asia, as well as in North America. The phylogenetic position of the genus within the Stipeae is well defined based on micromorphological patterns of lemma epidermis and moleculs. However, there is a lack of a comprehensive taxonomic revision of the genus in its entire distribution range. In this study, we performed comprehensive analyses using integrative taxonomic methods, aiming at both micromorphological and macromorphological analyses, and molecular analyses based on SNPs obtained from DArT genome-wide sequencing, in which we considered all taxa representing the genus in order to establish phylogenetic relationships between its members. We analysed all species possessing the characteristic ' pattern' of the lemma epidermis, with a particular reference to species possessing the terminal segment of the awn (seta) covered by short (up to 1 mm long) hairs that, until now, were treated as representatives of the genus . Following with the result of our molecular, morphological and anatomical analyses, the genus is represented by 15 species, one subspecies and five varieties organised in three well supported phylogenetic clades corresponding to the three sections: , and . In this paper, we provide an original key to identifying false needlegrass species, together with a checklist containing the intrageneric species-organisation. In addition, for each species, we present the data regarding nomenclatural types, morphological description, and information on the geographical distribution, habitat preferences and altitudinal ranges. We proposed two new varieties within the genus , P.glabrifoliavar.himalayensis and P.concinnavar.xizangensis, and the new section Chenella comprising three species with awns scabrous or covered by very short hairs up to 0.3 mm long. Additionally, we transfer to , Achnatherumchingiivar.laxum to P.chingiivar.laxum, and Ptilagrostisconcinnasubsp.schischkinii to P.junatoviivar.schischkinii. Lectotypification was made for three taxa, Stipamongholicavar.minutiflora, , and .
（假针茅属）是一类分布于中亚、东北亚以及北美洲的高山草本植物。基于外稃表皮的微观形态模式和分子特征，该属在针茅族中的系统发育位置已得到明确界定。然而，目前尚缺乏对该属在其整个分布范围内的全面分类修订。在本研究中，我们采用综合分类方法进行了全面分析，包括微观形态和宏观形态分析，以及基于从DArT全基因组测序获得的单核苷酸多态性（SNP）的分子分析，我们考虑了代表该属的所有分类群，以建立其成员之间的系统发育关系。我们分析了所有具有外稃表皮特征“模式”的物种，特别关注芒（刚毛）末端节段被短毛（最长1毫米）覆盖的物种，到目前为止，这些物种被视为该属的代表。根据我们的分子、形态和解剖分析结果，假针茅属由15个物种、1个亚种和5个变种组成，分为三个得到充分支持的系统发育分支，对应于三个组：、和。在本文中，我们提供了一份识别假针茅属物种的原始检索表，以及一份包含属内物种分类的清单。此外，对于每个物种，我们给出了关于命名模式、形态描述以及地理分布、生境偏好和海拔范围的信息。我们在该属内提出了两个新变种，喜马拉雅光叶假针茅（P.glabrifoliavar.himalayensis）和西藏雅致假针茅（P.concinnavar.xizangensis），以及新组Chenella，该组包含三个芒粗糙或被最长0.3毫米的极短毛覆盖的物种。此外，我们将 转移到 ，将疏花青针茅变种（Achnatherumchingiivar.laxum）转移到疏花假针茅变种（P.chingiivar.laxum），并将西伯利亚细柄茅亚种（Ptilagrostisconcinnasubsp.schischkinii）转移到朱纳托夫假针茅变种（P.junatoviivar.schischkinii）。对三个分类群，即蒙古针茅狭花变种（Stipamongholicavar.minutiflora）、 和 进行了选定模式指定。
