Latest Articles from PhytoKeys Latest 9 Articles from PhytoKeys https://phytokeys.pensoft.net/ Thu, 28 Mar 2024 22:07:56 +0200 Pensoft FeedCreator https://phytokeys.pensoft.net/i/logo.jpg Latest Articles from PhytoKeys https://phytokeys.pensoft.net/ Lectotypification of two names of Carex buekii hybrids (Cyperaceae) and notes on their morphology, ecology and distribution https://phytokeys.pensoft.net/article/113435/ PhytoKeys 236: 179-186

DOI: 10.3897/phytokeys.236.113435

Authors: Helena Więcław, Radomír Řepka, Jacob Koopman

Abstract: Lectotypes are designated for two Carex buekii hybrid names. The typification is supplemented with notes on their morphology, ecology, and distribution.

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Research Article Thu, 21 Dec 2023 19:49:43 +0200
Rhynchospora mesoatlantica (Cyperaceae), an imperiled new species of beaksedge from eastern U.S.A. https://phytokeys.pensoft.net/article/111271/ PhytoKeys 236: 65-81

DOI: 10.3897/phytokeys.236.111271

Authors: Amanda Treher Eberly, Robert F. C. Naczi

Abstract: Rhynchospora mesoatlantica sp. nov. (Cyperaceae) is described, illustrated, and compared with morphologically similar species. Rhynchospora mesoatlantica is known only from southern Delaware, southeastern Maryland, and southern New Jersey, all within the Mid-Atlantic region of the U.S.A. It inhabits sunny, wet margins of natural, shallow, nutrient-poor, seasonal ponds of the Coastal Plain. Narrow leaf blades; fruits obpyriform in outline; faces of mature fruits possessing a central, pale, well-demarcated disk; and fruit tubercle margins denticulate for most of their lengths indicate R. mesoatlantica is most similar to R. filifolia and R. harperi. Rhynchospora mesoatlantica is unique in its fruit dimensions, scales intermediate in length between R. filifolia and R. harperi, and relatively long fruit stipe. The NatureServe rank of Critically Imperiled and the IUCN rank of Endangered appear warranted for R. mesoatlantica because only six populations are known to be extant, most quite small and isolated; all populations occur within a small geographic area; populations have declined; and serious threats confront the survival of the species.

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Research Article Fri, 1 Dec 2023 17:37:28 +0200
Geometric Morphometrics sheds light on the systematics affinities of two enigmatic dwarf Neotropical sedges (Carex, Cyperaceae) https://phytokeys.pensoft.net/article/100410/ PhytoKeys 232: 167-187

DOI: 10.3897/phytokeys.232.100410

Authors: Ana Morales-Alonso, Tamara Villaverde, Pedro Jiménez-Mejías

Abstract: Geometric morphometrics (GM) is a powerful analytical tool that enables complete quantification of shapes. Its use in Botany has a great potential for complementing plant evolutionary and ecological studies. Taxonomic delimitation in Carex has been complicated due to reduction of characters and frequent homoplasy. This problem is more marked in cases where the species exhibit dwarfism. South America is the continent with the least understood Carex flora. The systematic relationships of some bizarre-looking groups were not unraveled until molecular phylogenetic studies resolved their relationships. In particular, there are two species only known from their type material whose affinities remain uncertain: Carex herteri and C. hypsipedos. These two taxa are acaulescent plants that respectively grow in the Uruguayan pampa and Peruvian high-altitude meadows. Recently, both species were ascribed to the Carex phalaroides group (subgen. Psyllophorae, sect. Junciformes) due to superficial morphological similarities, such as the androgynous peduncled spikes. However, their character combination is also coincident for its circumscription to sect. Abditispicae species. Nevertheless, in the absence of confirmation from molecular analyses, their placement must be considered preliminary until additional data can be provided. In this work we employ for the first time geometric morphometrics (GM) tools to assess the systematic affinities of two taxonomically problematic sedge species based on fruit shape. We compared utricle morphology of C. herteri and C. hypsipedos with that of C. phalaroides group and species in sect. Abditispicae. To this end we used GM and traditional morphometric approaches. Utricle shape variation along with other morphological features support the exclusion of these two species from the C. phalaroides gr. and, at the same time, show clear affinities of C. herteri to sect. Abditispicae. Carex hypsipedos remains as an incertae sedis species. Our work shows the potential utility of GM for the exploration of systematic affinities in sedges and in other graminoids.

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Research Article Thu, 21 Sep 2023 10:11:25 +0300
Notes on Carex (Cyperaceae) from China (IX): three new species of section Mitratae s.l. https://phytokeys.pensoft.net/article/101410/ PhytoKeys 225: 153-164

DOI: 10.3897/phytokeys.225.101410

Authors: Yi-Fei Lu, Zhao-Cen Lu, Yu-Hao Duan, Kun Zhang, Xiao-Feng Jin

Abstract: Carex sect. Mitratae s.l. was established by Kükenthal in 1909 and can be distinguished from the closely related sections in having nutlets frequently discoid-annulate at the apex and a persistent style base. Based on field surveys and specimen examination, three new species of sect. Mitratae are described and illustrated here. Carex fatsuaniana was collected from Yunnan and differs from C. truncatigluma in having the utricles nearly glabrous, the nutlets with a ca. 0.5 mm long beak at the apex, the staminate spikes cylindrical, 5–7.5 cm long, 4–5 mm wide, and the pistillate glumes acuminate at the apex. Carex damingshanica was collected from Guangxi and differs from C. breviscapa and C. rhynchachaenium in having 3 or 4 spikes, the lateral spikes cylindrical, the pistillate glumes, utricles and nutlets all shorter than in the other two species. Carex radicalispicula was collected from Sichuan and differs from C. truncatirostris in having the staminate spikes clavate, 1.5–2 mm wide, the pistillate glumes pale yellow-white, 3–3.2 mm long, acuminate or short-awned at the apex, and the nutlets with 3 angles shallowly constricted at the middle.

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Research Article Thu, 27 Apr 2023 22:29:18 +0300
Carex quixotiana (Cyperaceae), a new Iberian endemic from Don Quixote’s land (La Mancha, S Spain) https://phytokeys.pensoft.net/article/99234/ PhytoKeys 221: 161-186

DOI: 10.3897/phytokeys.221.99234

Authors: Carmen Benítez-Benítez, Pedro Jiménez-Mejías, Modesto Luceño, Santiago Martín-Bravo

Abstract: Despite centuries of work, the basic taxonomic knowledge of the flora of the Iberian Peninsula is still incomplete, especially for highly diverse and/or difficult genera such as Carex. In this study, we conducted an integrative systematic study based on molecular, morphological and cytogenetic data to elucidate the taxonomic status of several problematic Carex populations from La Mancha region (S Spain) belonging to Carex sect. Phacocystis. These populations have been traditionally considered of uncertain taxonomic adscription, but close to C. reuteriana due to their morphological appearance and ecological preferences. A detailed morphological and cytogenetic study was performed on 16 La Mancha’s problematic populations (Sierra Madrona and Montes de Toledo) to compare them with the other Iberian sect. Phacocystis species. In addition, a phylogenetic analysis was conducted using two nuclear (ITS, ETS) and two plastid (rpl32‐trnLUAG, ycf6‐psbM) DNA regions, including representatives from all species of sect. Phacocystis. We found a significant degree of molecular and morphological differentiation that supports the recognition of La Mancha’s problematic populations as a new Iberian endemic species, described here as Carex quixotiana Ben.Benítez, Martín-Bravo, Luceño & Jim.Mejías. Our results reveal that C. quixotiana, unexpectedly, is more closely related to C. nigra than to C. reuteriana on the basis of phylogenetic relationships and chromosome number. These contrasting patterns reflect the taxonomic complexity in sect. Phacocystis and highlight the need for integrative systematic approaches to disentangle such complicated evolutionary scenarios.

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Research Article Tue, 14 Mar 2023 14:01:12 +0200
Notes on Carex (Cyperaceae) from China (VIII): five new species and a new variety from southern and south-western China https://phytokeys.pensoft.net/article/77776/ PhytoKeys 188: 31-47

DOI: 10.3897/phytokeys.188.77776

Authors: Yi-Fei Lu, Xiao-Feng Jin

Abstract: Our field surveys and specimen examination of Carex from southern to south-western regions in China resulted in the discovery of five new species and one new variety, which are here named as Carex brevihispida X.F.Jin & Y.F.Lu (in sect. Surculosae), C. puberuliutriculata Y.F.Lu & X.F.Jin (sect. Clandestinae), C. paratatsiensis Y.F.Lu & X.F.Jin (sect. Aulocystis), C. huanjiangensis S.Yun Liang ex Y.F.Lu & X.F.Jin (sect. Decorae), C. liangiana X.F.Jin & Y.F.Lu and C. thibetica Franch. var. angustifolia X.F.Jin & Y.F.Lu (sect. Rhomboidales).

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Research Article Fri, 7 Jan 2022 12:23:19 +0200
 Carex malipoensis (Cyperaceae), a new species from southeast Yunnan, China https://phytokeys.pensoft.net/article/75401/ PhytoKeys 188: 19-29

DOI: 10.3897/phytokeys.188.75401

Authors: Yuan-Yuan Li, Ya-Ping Chen, Li-Qiong Jiang, En-De Liu, Yuan Luo, Hua Peng

Abstract: Carex malipoensis, a new species from southeast Yunnan, China, is here described and illustrated. It is morphologically similar to C. trichophylla in sect. Euprepes, but differs from it by its longer inflorescences and peduncles, pendulous spikes, hispidulous female glumes, densely hispidulous utricles, and longer nutlets.

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Research Article Fri, 7 Jan 2022 11:55:06 +0200
Taxonomic notes on Cyperaceae of Nepal: new records of a genus, six species and other noteworthy species https://phytokeys.pensoft.net/article/67634/ PhytoKeys 180: 141-156

DOI: 10.3897/phytokeys.180.67634

Authors: Prabin Bhandari, Satyam Chaudhary, Ajay Neupane, Shi-Liang Zhou, Shu-Ren Zhang

Abstract: This paper reports on the presence of one generic and six specific new records of Cyperaceous species for the flora of Nepal. Amongst the new discoveries are the genus Machaerina, alongside species: Eleocharis ochrostachys, Fimbristylis acuminata, F. ferruginea, F. nutans, F. thomsonii and Scleria rugosa. The taxonomy and distribution of Actinoscirpus grossus, Fimbristylis salbundia and Fuirena umbellata in Nepal are clarified through notes on nomenclature, description, distribution, specimen examination, identification keys and photographs.

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Research Article Mon, 9 Aug 2021 12:38:40 +0300
An annotated checklist of vascular plants of Cherangani hills, Western Kenya https://phytokeys.pensoft.net/article/30274/ PhytoKeys 120: 1-90

DOI: 10.3897/phytokeys.120.30274

Authors: Yuvenalis Morara Mbuni, Yadong Zhou, Shengwei Wang, Veronicah Mutele Ngumbau, Paul Mutuku Musili, Fredrick Munyao Mutie, Brian Njoroge, Paul Muigai Kirika, Geoffrey Mwachala, Kathambi Vivian, Peninah Cheptoo Rono, Guangwan Hu, Qingfeng Wang

Abstract: Cherangani hills, located in Western Kenya, comprises of 12 forest blocks, maintaining great plant diversity. However, little attention to plant diversity studies has been paid to it in the past years. Here, we present a checklist of the vascular plants of this region obtained through intensive field investigations and matching of herbarium specimens. In total, 1296 species, including 17 endemic species are documented, belonging to 130 families and 608 genera. This flora represents 18.50%, 43.83% and 54.17% of the Kenyan species, genera and families, respectively. The habit, habitat and voucher specimens, as well as brief notes on the distribution of each taxon recorded are presented in this checklist. It is the first exhaustive inventory of the terrestrial vascular plants in Cherangani hills which is a significant regional centre for plant diversity.

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Checklist Thu, 18 Apr 2019 11:40:46 +0300