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Morphological diversity and evolutionary changes of pollinaria in Hoya (Marsdenieae: Apocynaceae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2024-03-13 Yanfeng Kuang, Raozhen Jia, Michele Rodda, Jingfeng Zhang, Meng Xia, Chenghou Wu, Jingping Liao
The pollinarium morphologies of 85 species and four subspecies of Hoya were investigated in the present study. The longest pollinium was found in Hoya multiflora, the widest in H. archboldiana, and the smallest in H. bilobata. Pollinium shape showed the widest variation range of all palynological characters, and nine shapes were distinguished in this study. A pellucid margin was present in the pollinium
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Common garden experiments and SNP genotyping at the extremes of a steep precipitation gradient suggest local adaptation in a Patagonian conifer Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2024-03-05 Mariana Fasanella, Cintia P Souto, Thomas Kitzberger, Andrea C Premoli
Plants inhabiting contrasting physical conditions might develop local adaptations overriding the homogenizing effects of gene flow. Hypotheses of local adaptation on phenotypic, genomic, and environmental variation under extreme precipitation regimes were tested in the Patagonian conifer Austrocedrus chilensis. Common garden experiments on progeny and genotype-to-environment association analysis on
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Thepparatia vines (Hibisceae subtribe Trionum) phylogenomics and evolution Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2024-02-22 Sven Landrein, Shi-Jie Song, Jie Zhang, Yong-Jie Guo, Jian-Yong Shen, Qiu-Yu Jiang, Shook Ling Low
Hibisceae subtribe Trionum is the largest clade within Hibiscus s.l. and contains genera with a wide range of growth forms: herbaceous (Abelmoschus), shrubs (Malvaviscus), trees (Wercklea), and exceptionally lianas. The rare and localized Thepparatia species are unique in that they combine a lianescent habit and trioecy. Several problems have delayed the study of Hibisceae classification including
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Resilience to summer bushfire in the threatened orchid, Caladenia tessellata, in terms of pollination success, herbivory, and mycorrhizal associations Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2024-02-21 Ryan D Phillips, Jude Hatley, Xia Li, Richard J Dimon, Noushka Reiter
In some biogeographic regions, many threatened plant species occur in habitats that periodically experience bushfire. However, we currently have relatively little information on how important plant–animal and plant–fungus interactions are affected by these fires. For the threatened sexually deceptive orchid Caladenia tessellata we test whether pollination rate, frequency of florivory, and the species
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A bromeliad living in the city: a case of a native species resilient to urbanization in South Brazil Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2024-02-21 Renata de B Ruas, Sara M de Godoy, Daniele C Feliciano, Claudete de F Ruas, Fernanda Bered
In an era of increasing urbanization across the planet, understanding how urbanization affects biodiversity and whether or not species will be able to adapt quickly enough to urban environments is critical to conserving biodiversity. We studied the effects of urbanization on genetic diversity, genetic structure, and local adaptation in Tillandsia aeranthos, an epiphytic self-incompatible bromeliad
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Leaf micromorphology in Rosaceae tribe Spiraeeae (subfamily Amygdaloideae) and its systematic and ecological implications Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2024-02-19 Jun-Ho Song, Min-Kyeong Oak, Suk-Pyo Hong
We conducted a comparative micromorphological study on the leaves of all nine genera of the Rosaceae tribe Spiraeeae, including the monotypic Korean genus Pentactina. Spiraeeae possess amphistomatic and hypostomatic leaves. Leaf epidermal characteristics varied with the morphology of stomatal complexes, epidermal cells, trichomes, and epicuticular waxes. Specific leaf epidermal features may be systematically
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Trends of fruit morphogenesis in Pandanaceae: comparative carpology of Freycinetia Gaudich Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2024-02-17 Alexey V F Ch Bobrov, Nikita S Zdravchev, Mikhail S Romanov, Petr S Iovlev, Anna A Mikhaylova, Kirill V Kuptsov, Anton S Timchenko, Natalia D Vasekha, Alexey N Sorokin
With the current reassessment of the phylogeny of Pandanales, revealing the peculiarities of fruit structure of representatives of the order, as well as determination of apomorphies and plesiomorphies of the families included in the order are of importance. With the aim to fill in gaps in the data on fruit structure and to determine principal trends of fruit morphogenesis in Pandanaceae, the present
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Molecular analyses support revision of species diversity of the moss genus Bryum in Antarctica Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2024-01-30 N Cannone, I Vanetti, P Convey, L G Sancho, S Zaccara
Bryum is a moss genus that is widely distributed across the planet. Many of its species are characterized by large phenotypic and morphological plasticity, generating uncertainty in species identification exclusively based on morphological characteristics. In Antarctica, the extreme and harsh environmental conditions are further likely to promote intra-specific morphological variation, leading to complexity
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Stipules in angiosperms Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2024-01-18 Tongxin Ye, Louis Ronse De Craene
Stipules are generally regarded as the outgrowths of the leaf base in angiosperms. Other interpretations see stipules as independent organs comparable to leaves. Stipules have been recognized as an important trait for plant taxonomy and identification, and there has been great progress in the understanding of their morphology, development, origin, function, and gene regulation over time. Therefore
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Bark wings are related to the primary vascular system: the case of Piptadenia gonoacantha (Leguminosae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-12-11 Felippe A Teixeira, Caian S Gerolamo, Amilcar W S Junior, Marcelo R Pace
Bark wings are projections commonly interpreted as plant protective structures against herbivory. Their location in stems has been typically thought to be random, something that here we dispute, using Piptadenia gonoacantha as a case study. We collected stem samples from several specimens in different developmental stages from natural populations in the Brazilian Atlantic rainforest. These stems were
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Inherit the wind: evolution of reproductive traits in Cyperaceae Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-12-07 Ana Luisa Arantes Chaves, Ana Carolina Galindo da Costa, Isabel Cristina Machado, Rosemeri Morokawa, William Wayt Thomas, Suzana Maria Costa
Studies about reproductive aspects of angiosperms rarely refer to herbaceous and anemophilous groups. Cyperaceae are cosmopolitan and diverse in terms of sexuality, inflorescence architecture, and pollination modes, such as anemophily, entomophily, and ambophily. Therefore, the evolution of reproductive traits can clarify some questions about the reproductive biology of angiosperms, especially regarding
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Genomic data inform taxonomy and conservation of Critically Endangered shrubs: a case study of Zieria (Rutaceae) species from eastern Australia Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-12-07 Harvey K Orel, Todd G B McLay, Lydia K Guja, Marco F Duretto, Michael J Bayly
Zieria buxijugum, Z. formosa, and Z. parrisiae are three closely related, Critically Endangered species of questionable taxonomic validity that occur within six kilometres of each other on the south coast of New South Wales, Australia. We investigated genetic relationships and diversity of these species, along with two related but taxonomically distinct congeners, Z. granulata and Z. tuberculata, and
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Genetic and morphological differentiation within Euphorbia japygica (Euphorbiaceae) suggests divergence of populations from the south-eastern Apennine Peninsula Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-11-29 Micol Boschin, Peter Schönswetter, Božo Frajman
The Mediterranean Basin is a hotspot of animal and plant diversity. Contrary to the Balkan and Iberian Peninsulas that were subject of many phylogeographic studies in past decades, the Apennine Peninsula and, in particular, the diversification of its flora has been neglected in contemporary phylogenetic studies. The few available studies showed a complex pattern of north–south differentiation of genetic
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Multiple reproductive barriers maintain species boundaries in stone plants of the genus Argyroderma Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-11-14 Florian C Boucher, G Anthony Verboom, Laure Gallien, Allan G Ellis
Measuring the strength of different reproductive barriers across species pairs is key to reveal the mechanisms that have led to evolutionary radiations. Here we study a genus of miniature plants, Argyroderma, which comprises 11 species restricted to a single plain of the Southern African desert. We measure different reproductive barriers to understand how species boundaries are maintained in this genus
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Effects of climatic fluctuations on the fragmented distribution pattern of a Tertiary relict plant, Pseudotaxus chienii (Taxaceae), in subtropical China Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-11-10 Ning Li, Zhen Wang, Qi Deng, Ting Wang, Ying-Juan Su
Habitat fragmentation can facilitate local adaptation of species to heterogeneous environments and affect population demographic history. To understand the factors influencing evolutionary dynamics, such as climatic fluctuations and complex geomorphological features, we used 18 chloroplast microsatellites, 15 nuclear microsatellites, three chloroplast fragments, and two nuclear regions to explore the
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Plastid phylogenomics provide evidence to accept a new genus Pseudopeucedanum (Apiaceae) separated from Peucedanum s.l. Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-11-08 Chang-Kun Liu, Jiao-Jiao Deng, Bo-Ni Song, Huan-Huan Qin, Song-Dong Zhou, Xing-Jin He
The species Peucedanum ledebourielloides, a medicinally important herb, has previously been placed in Peucedanum s.l. based on dorsally compressed mericarps with slightly prominent dorsal ribs and narrowly winged lateral ribs. However, this genus has now been re-delimited in a narrow sense, namely Peucedanum s.s., further recognized by ternate leaves and glabrous plants, so that the taxonomic position
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A molecular phylogeny of the early-branching Genistoid lineages of papilionoid legumes reveals a new Amazonian genus segregated from Clathrotropis Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-11-07 Bernarda de S Gregório, Catarina S Carvalho, Gustavo Ramos, Lamarck Rocha, Charles H Stirton, Haroldo C de Lima, Charles E Zartman, Gwilym P Lewis, Benjamin M Torke, Cristiane Snak, Heriberto A D Higuita, Luciano P de Queiroz, Domingos Cardoso
Molecular phylogenetic studies focused on the early-branching papilionoid legumes have revealed many new clades and supported several generic realignments, yet the monophyly of some of the constituent genera has remained unassessed. This is the case for the Amazonian genus Clathrotropis of the tribe Ormosieae. The genus, as traditionally circumscribed, comprises seven species of trees, including some
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Homeologue differential expression in the flavonoid biosynthetic pathway underlies flower colour variation in natural and synthetic polyploids of Nicotiana tabacum (Solanaceae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-10-24 Elizabeth W McCarthy, Jacob B Landis, Abigail G McCoy, Amber J Lawhorn, Amelda Kurti, Yimin Xu, James J Giovannoni, Amy Litt
Homeologue expression bias occurs when one progenitor copy of a gene is expressed at a higher level than the other in allopolyploids. Morphological variation, including differences in flower colour, exists between natural and synthetic allopolyploids of Nicotiana tabacum and their progenitors. In this study, we use a comparative transcriptomic approach to investigate gene expression differences as
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Evolution of the floral nectaries in the Primulaceae sensus lato (Ericales) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-10-16 Mauricio J Cano, Louis Ronse De Craene
The Primuloid clade or Primulaceae sensus lato is well supported and contains several pollination syndromes, including wind pollination and insect pollination with pollen, nectar, or oil as a reward. Previous studies have recognized two types of nectaries (floral and extrafloral) with different distributions (e.g. ovary, stigma, style, pedicel). This study aimed to reassess the diversity of nectary
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Phylogeography and chromosome number variation in Micranthes nelsoniana and related species (Saxifragaceae) in Northeast Asia Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-10-16 Tomoko Fukuda, Naoko Ishikawa, Olga A Chernyagina, Vyacheslav Y Barkalov, Aleksandr A Taran, Valentin V Yakubov, Elena A Marchuk, Elena V Linnik, Ichiro Tamaki
Micranthes nelsoniana possesses multiple different variants and numerous chromosomes. Based on the internal transcribed spacer (ITS) and chloroplast (cp)DNA sequences, the phylogeography of M. nelsoniana and its relatives in Northeast Asia was investigated, with extensive sampling around the Kuril Islands. The Arctic–Asian continent and a clade of marginal islands were the two main groupings that comprised
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Molecular phylogenetics of Oxalis subg. Thamnoxys (Oxalidaceae) reveals artificial arrangements of traditional sections Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-10-14 Fernando S Cabral, Duane F Lima, Magdalena Vaio, Pedro Fiaschi
Oxalis subg. Thamnoxys is a mostly South American group of Oxalis encompassing almost 80 species from tropical habitats that are currently separated into nine sections based on morphology and geographic distributions. In this study, we investigated whether Oxalis subg. Thamnoxys and its sections are monophyletic. DNA sequences of the nrITS, trnL-trnL-trnF, and petA-psbJ from 92 specimens of Oxalis
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Rise and fall of a continental mesic radiation in Australia: spine evolution, biogeography, and diversification of Cryptandra (Rhamnaceae: Pomaderreae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-10-14 Francis J Nge, Jürgen Kellermann, Ed Biffin, Kevin R Thiele, Michelle Waycott
The Australian continent has experienced progressive aridification since the Miocene, spurring recent radiations of arid-adapted lineages and the likely decline of mesic biotic groups. While examples of the former have been relatively well-documented, post-Miocene declines of non-arid sclerophyllous floras are less well understood. Here, we present a well-sampled time-calibrated nuclear phylogeny (140
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Seed morphology of the Eriostemon–Phebalium clade (Rutaceae–Zanthoxyloideae) and implications for systematics Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-10-14 Bokyung Choi, Marco F Duretto, Suk-Pyo Hong
The Eriostemon–Phebalium clade (Rutaceae) includes c. 200 species across 16 genera, and is distributed in Australia (including Tasmania), New Caledonia, New Hebrides, New Zealand, and New Guinea. Phylogenetic analyses based on DNA sequences have consistently shown that the Eriostemon–Phebalium group is robustly monophyletic. However, despite this, taxonomy within the group is still uncertain: relationships
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Chenopodium ucrainicum (Amaranthaceae), a new ‘BB’ genome diploid species: karyological, cytological, and molecular evidence Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-10-11 Farzaneh Habibi, Sergei L Mosyakin, Oleksandr I Shynder, Karol Krak, Dijana Čortan, Gabrielle A Filippi, Bohumil Mandák
In 2020, S. Mosyakin and B. Mandák described a new species from the Chenopodium album aggregate, C. ucrainicum. The description of the species was based mainly on its distinct morphological characters. This study aims to improve our understanding of C. ucrainicum by combining karyological, cytological, molecular, and distribution information. All analyses demonstrated that C. ucrainicum is closely
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Comparative richness patterns of range sizes and life forms of Apocynaceae along forest–savanna transitions in Brazil Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-09-09 João de Deus Vidal, Christine B Schmitt, Ingrid Koch
Brazilian moist forests and savannas are some of the most species-rich biomes in the Neotropics. In the transition zones between these regions, ecotones often accumulate even higher taxonomic diversity. However, whether these ecotonal communities consist of overlapping species widespread from the neighbouring biomes or a specific set of locally adapted species still needs to be clarified. Regional
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Genomic stability in Cenostigma Tul., (Caesalpinioideae, Fabaceae): causes and consequences Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-25 Natália Castro, Yennifer Mata-Sucre, Jefferson Carvalho-Sobrinho, André Marques, Rubens Teixeira de Queiroz, Gustavo Souza
The Pantropical Caesalpinia group includes 225 species distributed in 27 monophyletic genera, among which Cenostigma stands out by taxonomic and phylogenetic complexity. The genus includes trees and shrubs with interspecific hybridization and high diversity in north-eastern Brazil (Caatinga domain). Detailed cytogenomic characterizations have been performed only in C. microphyllum revealing enrichment
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Phylogeny and infrageneric classification of Clerodendrum (Lamiaceae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-23 Jiratthi Satthaphorn, Alan J Paton, Alexandre R Zuntini, Robyn S Cowan, Charan Leeratiwong
The infrageneric classification of the genus Clerodendrum (Lamiaceae) has been highly problematic due to different concepts and subdivisions being applied to the treatment of Asian, Australian, and African species. Earlier molecular phylogenetic studies based on Sanger sequencing and limited sampling have indicated that previous morphology-based infrageneric classifications are not congruent with the
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Leaf morphology and anatomy of Schlechtendalia luzulifolia, a basal member of subfamily Barnadesioideae (Asteraceae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-19 Estrella Urtubey, María C Klusch, Tod F Stuessy
Based on molecular phylogenetic studies, Barnadesioideae have been proposed to be the basal subfamily of Asteraceae. This is a complex of 10 genera and 87 species distributed primarily along the Andean mountains, Patagonia, and into southern Brazil and Uruguay. Phylogenetic analyses have recovered all genera as monophyletic groups and have provided insights to their inter-relationships. Four generic
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Intersectional hybrids of Carex remota with C. otrubae and C. vulpina (Cyperaceae) in Europe Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-17 Jacob Koopman, Helena Więcław, Danuta Cembrowska-Lech
Carex vulpina and C. otrubae are closely related and morphologically similar species that hybridize with C. remota. The spontaneous appearance of hybrids can cause difficulties in the taxonomic treatment of this group. Morphological separation of the examined species and hybrids had been tested using discriminant function analysis (DFA). We have also analysed the effect of DNA barcoding on hybrid identification
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Monnina (Polygalaceae), a New World monophyletic genus full of contrasts Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-17 Alina Freire-Fierro, Felix Forest, Dion S Devey, José Floriano Barea Pastore, James W Horn, Xue-Jun Ge, Zhengyang Wang, Tian-Wen Xiao, Walter F Bien
Endemic to the Neotropics, Monnina is the second largest genus of Polygalaceae, yet little is known about its phylogenetic history, biogeography, and morphological character evolution. To address these knowledge gaps, we conducted Bayesian and maximum likelihood (ML) analyses of nuclear ITS and plastid trnL–F regions to test the monophyly of Monnina s.l. We used this phylogenetic framework to (i) infer
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Limitation of gene flow by distance in the common yellow jasmine (Chrysojasminum fruticans, Oleaceae): implications for the study of its mating strategies Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-17 Aurore Puyoou, Hervé Gryta, Anne-Laure Fuchs, Pierrick Blanchard, Pierre-Olivier Cheptou, Laure Civeyrel, Mathilde Dufay, Julia Dupin, Patricia Jargeat, Emilie Lecompte, Guillaume Besnard
The common yellow jasmine (Chrysojasminum fruticans, Oleaceae) is a distylous shrub occurring in the wild in south-western Europe and the Mediterranean Basin. Little is known about the genetics of its populations and such information would be necessary to investigate its spread and mating strategies. Here, the organization of its genetic diversity was investigated among and between 13 populations from
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Comparative floral anatomy in species of Cyperoideae (Poales: Cyperaceae) and insights into the evolution of floral traits Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-16 Lucimara Reis de Oliveira Silva, Rafael Trevisan, Aline Oriani
Species of Cyperoideae exhibit wide morphological variation in their flowers due to reduction processes. Their flowers can be bisexual or unisexual, achlamydeous or not, with tepals and stamens varying from one to six and a trimerous or dimerous gynoecium, the latter dorsiventrally or laterally flattened. We studied the floral anatomy and vasculature of Fuirena robusta, Cyperus sesquiflorus, Rhynchospora
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Can flowers help to disentangle the Vriesea oligantha complex (Bromeliaceae: Tillandsioideae)? Taxonomic implications and contributions to the floral anatomy and biology of Stigmatodon Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-09 Kleber R Silva, Aline Oriani, Leonardo M Versieux, Adriana P Martinelli
The Vriesea oligantha complex comprises Vriesea lancifolia, Vriesea oligantha, and Vriesea pseudoligantha, which were recently transferred to Stigmatodon. Such species exhibit strong morphological convergence to live in rocky fields, which makes difficult their identification in the wild or in herbarium specimens. In a previous work, leaf characters helped in the species delimitation and evidenced
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Morphologically hypervariable species hinder our knowledge of biodiversity: Daustinia montana (Convolvulaceae) as a case study Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-04 Juliana Alencar, Jefferson Rodrigues Maciel, Maria Teresa Buril
Cryptic species continue to intrigue taxonomists over time and hamper biodiversity knowledge. An example of what would be considered a cryptic species is Daustinia montana (Convolvulaceae). Its wide leaf morphology plasticity has led to multiple interpretations and contrasting classifications: from a monotypic to a six-taxa hypothesis. For this work, we tested six taxonomic hypotheses, including an
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In search of lost time: tracing the fossil diversity of Podocarpaceae through the ages Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-04 Ana Andruchow-Colombo, Ignacio H Escapa, Lone Aagesen, Kelly K S Matsunaga
The Podocarpaceae are a morphologically diverse conifer family that have a cryptic fossil record reported since the Permian. We reviewed the fossil record of Podocarpaceae, tested the affinities of its oldest records using phylogenetic analyses, compiled macrofossil occurrence records, and investigated the diversity, distribution, and morphology of Podocarpaceae through time. We found that Permian
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The pericarp structure and histogenesis in Enkianthus: on the ancestral fruit type in Ericaceae family Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-01 Alexey N Sorokin, Olga V Yatsenko, Alexey V F Ch Bobrov, Mikhail S Romanov, Nikita S Zdravchev, Petr S Iovlev, Anton S Timchenko, Anna A Mikhaylova, Natalia D Vasekha, Kirill V Kuptsov
According to modern phylogenetic data, the monotypic subfamily Enkianthoideae is sister to all other subfamilies of the family Ericaceae s.l. Aiming to determine the peculiarities of development and structure of Enkianthus pericarp and to reveal the principal characters of its structure, which can be original for the Ericaceae, we have studied fruit anatomical structure at different stages of development
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Fire, frost, and drought constrain the structural diversity of wood within southern African Erica (Ericaceae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-01 F M Akinlabi, M D Pirie, A A Oskolski
Erica comprises ~860 species of evergreen shrubs and trees ranged from Europe to southern Africa and Madagascar. Wood structure of the around 20 European species is well studied, but despite its relevance to adaptation across the wider geographic range, it has not yet been explored across the much greater diversity, particularly of southern African lineages. In this study, we examine wood structure
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Apomixis occurs frequently along the entire American Cordillera Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-08-01 Jan Ptáček, Petr Sklenář, Adam Klimeš, Katya Romoleroux, Romina Vidal-Russell, Tomáš Urfus
Apomictic plants mostly occur at higher latitudes and higher elevations, where they tend to occupy deglaciated areas. By analysing samples of the alpine floras of different latitudinal zones of the Americas (Argentina, Bolivia, Ecuador, USA), we investigated whether the proportion of gametophytic apomixis is comparable between the temperate alpine zones of the Northern Hemisphere and the Southern Hemisphere
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Atypical tracheid organization in proximal wood of late Palaeozoic Sigillaria approximata Fontaine et White (Lycopsida) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-07-25 Michael P D’Antonio
It is thought that arborescent lycopsid cambial expansion kept pace with radial wood growth via tangential broadening of the fusiform initials, resulting in progressive outward expansion in tracheid diameters and an absence of de novo tracheid files. This pattern appears in distal lycopsid axes but has not been investigated in proximal-most trunk vasculature where wood was thickest and primary xylem
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Surrounded by concrete: genetic isolation of Tillandsia recurvata L. in an urban landscape in southeastern Brazil Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-07-17 Megan Rhianne Quail, Flavio Nunes Ramos, Thom Dallimore, Paul Ashton, Jennifer Clayton-Brown, Jim Provan, Sven Peter Batke
Increasing urban expansion has resulted in the decline of many natural and seminatural communities globally. However, the connectivity and genetic structure of species that survive in these urban landscapes have received little attention, especially with regard to epiphytic plants. This study aimed to describe and evaluate the connectivity and genetic structure of populations of Tillandsia recurvata
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Intracellular gene transfer and codon usage of cytoplasmic genomes in green plants Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-07-14 Ting-Ting Zhang, Yang-Yan Zhang, Xiao-Ling Wang, Chen-Qi Zhang, Wen-Hua Shi, Ai-Gen Fu, Min-Feng Fang, Xiao Zhang, Zhong-Hu Li
Intracellular gene transfer is widely recognized as one of the most important driving forces for species evolution. Here we investigated transferred cytoplasmic motifs in green plants including spore-bearing plants and seed-bearing plants (hereafter termed spore plants and seed plants) . Our analyses revealed that gene transfer in spore plants was characterized by shorter motifs than that of seed plants
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Young stem and leaf anatomy of 15 Malagasy-endemic Diospyros species (Ebenaceae): taxonomic implications Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-07-07 Ninah Andrianasolo Sandratriniaina, Ravo Nantenaina Ramanantsialonina, Bakolimalala Rakouth, Michael C Wiemann, John C Hermanson, Bako Harisoa Ravaomanalina
Eighty-eight of the 255 Diospyros species from Madagascar are potential sources of ebony wood. Unfortunately, several species are currently threatened with extinction due in part to illegal and unsustainable logging. Reliable identification of living Diospyros species is necessary prior to any sustainable exploitation, so as not to compromise those species threatened with extinction. This study aims
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Eocene palynoflora from the La Marcelina Formation, Patagonia, Argentina Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-07-07 Sol Noetinger, Inés Aramendía, Roberto R Pujana, Juan L García Massini, Viviana D Barreda
Southern Patagonia contains several Eocene fossiliferous deposits that have only been superficially explored and studied. One of these corresponds to the La Marcelina Formation with outcrops in the south-western slope of the Deseado Massif, Santa Cruz Province, Argentina. No detailed palynological studies have been performed so far in this unit. Here we estimate the age, palaeoenvironment, and climatic
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The origin and fate of fungal mitochondrial horizontal gene transferred sequences in orchids (Orchidaceae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-07-05 Janice Valencia-D, Kurt M Neubig, David P Clark
The transfer of DNA among distantly related organisms is relatively common in bacteria but less prevalent in eukaryotes. Among fungi and plants, few of these events have been reported. Two segments of fungal mitochondrial DNA have been recently discovered in the mitogenome of orchids. Here, we build on that work to understand the timing of those transfer events, which orchids retain the fungal DNA
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Insights into the morphology and evolution of orbicules in the Spermacoce clade (Spermacoceae-Rubiaceae) and implications for systematics Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-07-05 Mariela Nuñez-Florentin, Brecht Verstraete, Roberto M Salas, Steven Dessein
The orbicules are tiny structures of sporopollenin that occur on the interior wall of anthers in several groups of plants, and they are associated with pollen grains and tapetal cells. Although their function remains still unresolved, they have been widely used in systematics. Rubiaceae is one of the most studied families in this aspect. However, scarce information is available about the orbicules
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Phylogenetic relationships and diversification dynamics of Cerastium (Alsineae: Caryophyllaceae): implications for biogeographical patterns of herbs in the Northern Hemisphere Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-07-03 Cui Liu, Rui-Xia Zhang, Lin Li, Jun-Xia Su, Sheng-Dan Wu, Liang Xiong, Lin-Jing Zhang
The evolutionary history of herbaceous species in the Northern Hemisphere remains poorly understood. The genus Cerastium is one of the most species-rich herbaceous genera in the Alsineae (Caryophyllaceae), and is mainly distributed in the Northern Hemisphere. Thus, it provides an ideal opportunity to explore the biogeographical history of herbs in the Northern Hemisphere. Here, we present a comprehensive
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Floral trait variation in a putative hybrid zone between specialist pollination systems: how could it impact pollinator attraction? Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-07-02 Maria Alice M S Couto, Marcelo C Teixeira, Alexia Gope, Alice Backes, Daniele M Rodrigues, Geraldo L G Soares, Caroline Turchetto
Floral traits are used as signals to attract pollinators and play an important role in species identification and isolation. Nicotiana is a genus with a diverse range of flower morphologies, colours, and pollination systems related to a natural history of hybridization, a driver of speciation in this genus. Nicotiana alata and Nicotiana forgetiana are pollinated by hawkmoths and hummingbirds, respectively
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Morphological and anatomical evolution of species of Valeriana (Caprifoliaceae) during the uplift of the Andean range Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-07-02 Rafael Cruz, Adam Klimeš, Jiří Doležal, Petr Sklenář, Jitka Klimešová
Andean species of Valeriana are frequently pointed to as an example of island woodiness, i.e. plants with herbaceous ancestors that usually evolve woodier forms on islands. We investigated this phenomenon through morphoanatomical and phylogenetic analyses. Plants were collected in the Páramos of Ecuador and had their vegetative morphology described. Stems were sectioned for histological analyses. We
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Repeated evolution of pollination syndromes in a highly diverse bromeliad lineage is correlated with shifts in life form and habitat Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-07-01 Beatriz Neves, Paola de L Ferreira, Francisco Prosdocimi, Igor M Kessous, Dayvid R Couto, Ricardo L Moura, Fabiano Salgueiro, Andrea F Costa, Christine D Bacon, Alexandre Antonelli
Mutualistic plant-pollinator interactions play a critical role in the diversification of flowering plants. The spatiotemporal correlates of such interactions can be understood in a phylogenetic context. Here, we generate ddRAD-seq data for the highly diverse Vriesea-Stigmatodon lineage to test for correlated trait evolution among pollination syndromes and life form, habitat type, and altitude. Our
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Floral morphology and development of Epimedium pubescens and Plagiorhegma dubium (Berberidaceae) and their systematic significance Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-06-30 Yu Zhang, Jing-Zhi Gong, Chao-Xia Gui, Si-Yu Xie, Zhao-Ping Yang, Min-Rong Luo, Sui-Xia Ning, Zhao-Yang Chang, Bing Kang, Liang Zhao, Louis Ronse De Craene
Epimedium and Plagiorhegma are the representatives of two early-diverging clades in Podophylloideae of Berberidaceae. Flowers are dimerous and trimerous respectively, but their floral development is little known. Here, we used scanning electron microscopy to clarify the structure and development of flower and inflorescence in Epimedium pubescens and Plagiorhegma dubium and compared these with other
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Combining Angiosperms353 and Sanger data provides support for the reinstatement of the genus Myrianthemum (Melastomataceae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-06-29 Luo Chen, Gudrun Kadereit, Marie Claire Veranso-Libalah
The increasing availability of DNA sequence data, in particular target enrichment data based on the universal Angiosperms353 probe set, but also accumulated Sanger data from previous phylogenetic studies, is facilitating the placement of taxa that are difficult to place with certainty based on morphological evidence alone. Here, we investigate phylogenetic relationships of Medinilla mirabilis (Melastomataceae)
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Cytomolecular characterization of early and late condensing chromosome regions in some Annonaceae species Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-06-29 Amanda Santos, Thiago Nascimento, Leonardo P Felix, Marcelo Guerra
The condensation patterns (CPs) of prophase chromosomes represent poorly explored and little understood karyotype features. Three distinct chromosome domains are observed in conventionally stained prophases of most angiosperms with small chromosomes: heterochromatin and early condensing euchromatin (ECEu), which are observed as early condensing regions (ECRs), and late condensing euchromatin or late
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Evolution of cold tolerance in the highly stress-tolerant samphires and relatives (Salicornieae: Amaranthaceae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-06-19 Ruben Cousins-Westerberg, Nicole Dakin, Laura Schat, Gudrun Kadereit, Aelys M Humphreys
Low temperature constitutes one of the main barriers to plant distributions, confining many clades to their ancestrally tropical biome. However, recent evidence suggests that transitions from tropical to temperate biomes may be more frequent than previously thought. Here, we study the evolution of cold and frost tolerance in the globally distributed and highly stress-tolerant Salicornieae (Salicornioideae
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Architectural traits underlie growth form diversity and polycarpic versus monocarpic life histories in Cerberiopsis (Apocynaceae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-06-16 Camille Salmon, Sandrine Isnard, Yves Caraglio, Patrick Heuret
Plant architecture strongly influences plant growth habits, as it determines the arrangement, function and fate of meristems. How architecture could be involved in the monocarpic life history, i.e. dying after flowering, remains poorly investigated. Monocarpy is evident in some species since they are annual or because their single stem flowers apically. However, monocarpy in long-lived branched trees
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Pollen characteristics used in determination and systematics of Quercus (Fagaceae): new data and verification of previous concepts Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-06-08 Maria V Tekleva, Svetlana Polevova, Natalia N Naryshkina
Quercus (oaks) is a large and important genus of woody angiosperms occurring in a wide range of environments and often occupying a dominant position in temperate forests of the Northern Hemisphere or being a minor component in some subtropical and tropical forests. A reliable determination of fossil dispersed oak pollen requires combined light, scanning electron (SEM) and transmission electron microscopy
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Widespread coexistence of genetically distinct morphotypes in the Satyrium longicauda complex (Orchidaceae) Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-04-16 Miguel Castañeda-Zárate, Steven D Johnson, Timotheüs Van Der Niet
Species-level taxonomy is traditionally based on herbarium collections that typically include few, or even single, representatives per site. This can lead to underestimation of diversity when there are sympatric populations of superficially similar plants belonging to different lineages. Satyrium longicauda (Orchidaceae) represents a taxonomic challenge for the delimitation of species boundaries due
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Hotspots within a hotspot: evolutionary measures unveil interesting biogeographic patterns in threatened coastal forests in Chile Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-04-12 Daniela Mardones, Rosa A Scherson
Given the continuous loss of biodiversity, there is an urgent need to study its patterns to generate conservation measures. Complementing traditional biodiversity measures with indices that incorporate evolutionary aspects such as phylogenetic diversity or phylogenetic endemism (PD or PE) allows us to infer possible historical processes that could explain the conformation of current biodiversity. In
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A dated phylogeny of the Neotropical Dipterygeae clade reveals 30 million years of winged papilionate floral conservatism in the otherwise florally labile early-branching papilionoid legumes Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-04-12 Catarina S Carvalho, Haroldo Cavalcante de Lima, Maristerra Rodrigues Lemes, Charles E Zartman, Cássio van den Berg, Carmen Rosa García-Dávila, Eurídice N Honorio Coronado, Malte Mader, Kathelyn Paredes-Villanueva, Niklas Tysklind, Domingos Cardoso
The early-branching clades of Fabaceae subfamily Papilionoideae are characterized by their remarkable lability in floral architecture. In contrast, more derived papilionoid lineages are marked by evolutionary conservatism towards strongly bilateral, papilionate flowers. Here, we show an unexpected example of conservatism of a unique floral architecture during the early diversification history of the
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Beyond the various contrivances by which orchids are pollinated: global patterns in orchid pollination biology Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-03-11 James D Ackerman, Ryan D Phillips, Raymond L Tremblay, Adam Karremans, Noushka Reiter, Craig I Peter, Diego Bogarín, Oscar A Pérez-Escobar, Hong Liu
Orchidaceae show remarkable diversity in pollination strategies, but how these strategies vary globally is not entirely clear. To identify regions and taxa that are data-rich and lend themselves to rigorous analyses or are data-poor and need attention, we introduce a global database of orchid reproductive biology. Our database contains > 2900 species representing all orchid subfamilies and 23 of 24
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Towards a better understanding of Prunus (Rosaceae): molecular and morphological notes on Prunus subgenus Cerasus in Turkey Bot. J. Linn. Soc. (IF 2.4) Pub Date : 2023-03-08 Almila Ciftci, Yusuf C Gercek, Rachel Mollman, Pinar I Bostanci Ordu, Ceyda Yazici, Ahmet E Yaprak, Hande Morgil, Levent Şik, Osman Erol
In this study, we explore the relationships among taxa of Prunus subgenus Cerasus in Turkey using a combination of macromorphology, micromorphology and molecular techniques. We recorded qualitative and quantitative characteristics of flowers, leaves, seeds and endocarp for 96 populations representing 14 taxa of Prunus subgenus Cerasus. ITS, matK, ycf1, trnL-trnF DNA sequence data were used to reconstruct