Flora最新文献

{"title":"Leaf anatomy of species from the Pombalia lanata complex (Violaceae) with implications for taxonomy and ecology","authors":"Jailma Rodrigues Gonçalves ,&nbsp;Juliana de Paula-Souza ,&nbsp;Vinícius Coelho Kuster ,&nbsp;Valdnéa Casagrande Dalvi","doi":"10.1016/j.flora.2024.152471","DOIUrl":"10.1016/j.flora.2024.152471","url":null,"abstract":"<div><p>As traditionally circumscribed, <em>Hybanthus</em> Jacq. was the third-largest Violaceae genus, and the circumscription of its 9-10 lineages has been very problematic, particularly <em>Pombalia</em> Vand.. This largest and most heterogeneous segregate genus includes a phylogenetically strongly supported subclade exclusive of the Brazilian Cerrado known as <em>Pombalia lanata</em> complex comprising six species. Though this complex is readily distinct due to its adaptations to the Cerrado environment, the often sympatric species exhibit a high degree of superposition in its features, hampering their precise identification. Here, we aim to verify the taxonomic value of leaf anatomy for the species of the <em>Pombalia lanata</em> complex, comparing them to its sister group <em>Pombalia calceolaria</em>. An additional goal was to identify characters related to the adaptation of these species to the constraining environmental conditions of the Cerrado. Expanded leaves (field-collected and herbarium materials) were processed using light and scanning electron microscopy and histochemistry. The species present diminutive and densely hairy leaves, with simple or branched (stellate) trichomes, colleters, uniseriate and mucilaginous epidermis and prismatic calcium oxalate crystals. Among these characters, the distribution and morphotype of tector trichomes, and presence of marginal colleters are potentially useful in distinguishing the species of the complex. The remaining anatomic characters are mostly effective in circumscribing the complex as a whole, and reinforce the proximity to its sister group <em>P. calceolaria</em>. Moreover, such characteristics reflect adaptative strategies to the unique Cerrado conditions of high temperatures and solar irradiance, severe seasonal water shortfall, low humidity, and nutrient-poor soils with high aluminum content. This is the first description of colleters in Violaceae, opening perspectives in studies with secretory structures in the group. Our work highlights the potential of anatomy in taxonomic studies, which can be applied to <em>Pombalia s. str</em>. and the remaining lineages of <em>Hybanthus s.l</em>.</p></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139920527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A multitude of bee pollinators in a phenotypic specialist - pollinator diversity from the plant's perspective","authors":"Noel Silló,&nbsp;Regine Claßen-Bockhoff","doi":"10.1016/j.flora.2024.152461","DOIUrl":"https://doi.org/10.1016/j.flora.2024.152461","url":null,"abstract":"<div><p>Bilabiate flowers are phenotypically specialized and primarily pollinated by bees. However, this phenotypic specialization does not necessarily result in functional and/or ecological specialization. We use the bee-pollinated <em>Salvia pratensis</em> L. (Lamiaceae) as a model species to elucidate the number of pollinators, their fitting to the flower and their behavior in order to identify the best fitting pollinators and most capable foragers. Field observations at 12 localities between 2018 and 2023 revealed in total 37 bee species as pollinators. Based on morphometric and behavioral data, handling time per flower, number of flowers visited per minute and an index of the proportion of bee contacts with reproductive surfaces per flower visit, big and long-tongued bee species were identified as the best fitting pollinators and most capable foragers. We conclude that <em>S. pratensis</em> is a functional specialist and ecological generalist at the same time. This combination is advantageous in species assemblages with moderately specialized partners as it combines the advantages of generalization (high number of pollinator species) with those of specialization (economic pollen transfer).</p></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0367253024000148/pdfft?md5=80f545a48c2d05ffe1ae7ccfa81f86bc&pid=1-s2.0-S0367253024000148-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139743939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ontogeny of interxylary phloem and stem anatomy of the Cuban endemic Henleophytum (Malpighiaceae)","authors":"Angélica Quintanar-Castillo ,&nbsp;Pedro A. González Gutiérrez ,&nbsp;Marcelo R. Pace","doi":"10.1016/j.flora.2024.152458","DOIUrl":"10.1016/j.flora.2024.152458","url":null,"abstract":"<div><p>Lianas and vascular variants have long been correlated since it is in lianas where they are most commonly found. Structurally, these vascular variants mix soft and stiff tissues allowing lianas to twist without breaking when climbing up to the forest canopies. The study of vascular variants in Malpighiaceae lianas has a long history focusing on species-diverse taxa; however, interest in understanding them in understudied, smaller taxa has unraveled vascular variants previously unknown to the family, such as the interxylary phloem of <em>Henleophytum</em>, a Cuban endemic, monospecific genus. Interxylary phloem in Malpighiaceae had been previously recorded in the distantly related genera <em>Dicella, Niedenzuella</em>, and <em>Tristellateia</em>. Interxylary phloem in <em>Henleophytum</em> derives from a cambium that in certain periods and sites produces phloem both inward and outward, similar to the pattern described for <em>Dicella</em>. The phloem produced outward is not equal to that produced inward. Indeed, sieve tube elements of the inner phloem are always much wider and more abundant, something likely indicative of a division of labor between both phloem types, one specializing in conduction and the other in carbohydrate storage. This constitutes a new report of a vascular variant outside the large Tetrapteroid clade, where almost all the vascular variants have been reported for the family so far, and supports the idea of the independent, multiple origins of vascular variants in Malpighiaceae.</p></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139516230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seed dispersal and germination of Lilium concolor var. megalanthum (Liliaceae) in wetland of Northeast China","authors":"Xin Chen ,&nbsp;Lei Wang ,&nbsp;Xingfu Yan ,&nbsp;Zhanhui Tang","doi":"10.1016/j.flora.2024.152459","DOIUrl":"10.1016/j.flora.2024.152459","url":null,"abstract":"<div><p>Some wetland plants can regenerate and expand their populations through sexual reproduction (seeds). <em>Lilium concolor</em> var. <em>megalanthum</em> is the only <em>Lilium</em> species known to occur in wetlands in Northeast China at present, its seed dispersal pattern and germination strategy reflects its adaptation to the wetland environment. In this paper, the adaptation mechanism of <em>L. concolor</em> var. <em>megalanthum</em> to wetland environments was explored by investigating its seed dispersal pattern and germination characteristics in different habitats. The results showed that the capsule and seed structure of <em>L. concolor</em> var. <em>megalanthum</em> is conducive to wind dispersal. The number of cumulative seed dispersed increased with the increase of wind speed. The seed dispersal of <em>L. concolor</em> var. <em>megalanthum</em> through wind can improve the dispersal efficiency of the plant propagule to a certain extent, and it may also be an adaptive strategy of increasing the genetic diversity of population. The flowing water in the wetland helps to disperse the seeds of <em>L. concolor</em> var. <em>megalanthum</em> to a certain extent. The germination performance of seeds was greatest inside the hummock of <em>Carex schmidtii</em>, followed by the germination performance on the surface of exposed soil layer after the seeds were dispersed around <em>L. concolor</em> var. <em>megalanthum</em>. We found that water quality conditions affect the seed germination performance of <em>L. concolor</em> var. <em>megalanthum</em>, and it was the best in clean water, while the seed germination was significantly inhibited when the seeds were dropped into sewage.</p></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139690414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanical advantage of subsidiary cells depends on the stomatal complex structure","authors":"Anatoly Pautov ,&nbsp;Svetlana Bauer ,&nbsp;Olga Ivanova ,&nbsp;Alexandra Ivanova ,&nbsp;Elena Krylova","doi":"10.1016/j.flora.2024.152457","DOIUrl":"10.1016/j.flora.2024.152457","url":null,"abstract":"<div><p>Structural features of stomatal complexes influencing the mechanical advantage of subsidiary cells were studied. Light, scanning and transmission electron microscopy were used to research the morphology of <em>Fagraea ceilanica</em> stomatal complexes. Their guard cells are located on subsidiary cells. The walls of the subsidiary cells are thickened unevenly. The inner tangential walls are thin and most extensive as compared to other walls of these cells. The data obtained allowed a 3D model of <em>F. ceilanica</em> stomatal complex to be constructed. To elucidate the interaction between the guard and subsidiary cells during stomatal movements, we have applied modelling using the finite-element method. According to the modelling results, the mechanical advantage of the subsidiary cells depends on mutual location of the guard and subsidiary cells, uneven thickening, area and rigidity of the subsidiary cell walls and presence of substomatal chambers, into which the inner tangential walls of the subsidiary cells can bulge when turgor pressure in these cells increases. The modelling results were confirmed by the observed deformations in actual stomatal complex cells of <em>F. ceilanica</em>. The decrease in mechanical advantage of the subsidiary cells ensures stoma opening in the conditions of excessive saturation of the epidermis with water, for example, in the conditions of tropical rainforests.</p></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139516208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atypical tristyly and generalist pollination system in a population of Oxalis psoraleoides (Oxalidaceae)","authors":"Luciana Soares Lima ,&nbsp;Túlio Freitas Filgueira de Sá ,&nbsp;Sinzinando Albuquerque-Lima ,&nbsp;Arthur Domingos-Melo ,&nbsp;Isabel Cristina Machado","doi":"10.1016/j.flora.2024.152462","DOIUrl":"https://doi.org/10.1016/j.flora.2024.152462","url":null,"abstract":"<div><p>Heterostyly is a polymorphism of reproductive structures, which can manifest as distyly or tristyly, depending on whether there are two or three floral morphs in the population. Such system commonly exhibits a heteromorphic incompatibility system, reciprocal heights in the sexual organs between floral morphs, and a balanced ratio of the morphs in a population. Deviations in heteromorphic incompatibility systems can result in alterations in the heights of reproductive structures and illegitimate crossing between stamens and styles of different heights and between individuals of the same morph, representing atypical heterostyly. This study aimed to detect the variation of the floral morph ratios in a tristylous population of <em>Oxalis psoraleoides</em> (Oxalidaceae) and to analyze the possible mechanisms involved, such as pollinator frequency, reciprocal herkogamy and the presence of heteromorphic incompatibility. We investigated variation of the morph ratio (1:1:1), stigma-anther reciprocity estimated by the floral inaccuracy index, frequency of visitors/pollinators, and evaluated the reproductive system. The population of <em>O. psoraleoides</em> is characterized as anisopletic with the mid-styled morph being most frequent. Its flowers were pollinated mainly by bees and lepidopterans, the latter being more frequent. In the analysis of reciprocal herkogamy, the lower organs show lower values of floral inaccuracy, thus representing the level with the highest degree of reciprocal herkogamy, followed by the medium and the upper level. <em>Oxalis psoraleoides</em> is self-incompatible, despite forming fruits in illegitimate cross-pollinations. We consider the study population of <em>O. psoraleoides</em> as tristylous due to the disproportion among the morphs and the deviations in the degrees of compatibility. Supported by the fact that fruits only form in legitimate and illegitimate intermorph crosses, we suggest that the mixed pollination system may be contributing to the presence of atypical characteristics in the <em>Oxalis</em> clusters of the population studied.</p></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139719302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Glandular trichomes as a source of antifungal metabolites in a karyologically characterized population of Argyrochosma flava: Morphology and histochemistry","authors":"Ana M. Rodriguez ,&nbsp;Marcos G. Derita ,&nbsp;Aldo R. Andrada ,&nbsp;Valeria de los A. Páez ,&nbsp;Mónica Ponce ,&nbsp;Olga G. Martínez ,&nbsp;Diego A. Neira ,&nbsp;Marcela A. Hernández","doi":"10.1016/j.flora.2024.152456","DOIUrl":"10.1016/j.flora.2024.152456","url":null,"abstract":"<div><p><em>Argyrochosma</em>, a xeric-adapted fern genus mostly from the New World, includes both farinose and non-farinose species. The yellow farina appears to be a synapomorphy of <em>A. flava</em>. The aims of this research were to study the morphology, location, distribution, and density of glandular trichomes; perform a histochemical analysis of the farina secretion; evaluate the biological activity of farinas against phytopathogenic fungi; and characterize the species genetically by making chromosome counts and building the karyotype of <em>A. flava</em>. Usual methods in plant anatomy and histochemistry were performed. Minimum Inhibitory Concentrations (MICs) and Minimum Fungicidal Concentrations (MFCs) of farina against four phytopathogenic fungi were determined by the broth microdilution technique. Chromosome counts and karyotyping metaphase plates were obtained from fiddleheads. The distribution of glandular trichomes in pinnules changes along the ontogenetic development of the frond. The histochemical study of the trichomes revealed the complex nature of the secreted material, including flavonoids and terpenes along with other metabolites. The farina was active against the four pathogenic fungi evaluated, with MICs between 31.25 and 125 μg/mL showing the highest inhibition for <em>Monilinia fructicola. Botrytis cinerea</em> displayed a MIC value of only one-fold dilutions more than the commercial fungicide Carbendazim. Cytogenetically, the base number proposed for the genus is <em>x</em> = 27, which is derived from aneuploidy of <em>x</em> = 29. The genus has diploid and tetraploid forms. The results obtained support the important role of glandular trichomes and farinous exudate secretion in the protection against phytopathogenic fungi. The obtained chromosome numbers support the taxonomic placement of <em>A. flava</em>.</p></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139516017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Floral biology, pollination biology, and breeding mechanisms reveal challenges to the restoration of Buchanania lanzan, a vulnerable plant species","authors":"Sonal Bhatnagar ,&nbsp;Reeta Kumari","doi":"10.1016/j.flora.2024.152448","DOIUrl":"10.1016/j.flora.2024.152448","url":null,"abstract":"<div><p>Understanding a species' reproductive biology, which encompasses floral biology, pollination biology, and breeding system, is necessary for the restoration of endangered plant species. <em>Buchanania lanzan</em> is a vulnerable evergreen tree in IUCN Red Data Book due to excessive deforestation and over-exploitation. Light and scanning electron microscopy and histochemical analysis were used to study floral and pollination biology. Experiments were conducted to study floral and pollination biology, including pollen viability, stigma receptivity, and pollen-pistil interactions. Bisexual, pentamerous, complete yellowish-white flowers have an annual growth of 11 months and are arranged in terminal and axillary panicles. Anthers dehisce between 10.30 and noon, 9–10 h after anthesis. Stigmas were receptive at the time of anther dehiscence and remained receptive for two days. The flowers contain sucrose-rich nectar and emit a mild scent to attract visitors, including <em>Musca domestica, Apis cerena indica,</em> and black ants. None of these visitors appeared to be an effective pollinator. The results of pollination trials showed that the species outcrosses with low levels of selfing. Cross-pollinated flowers had a higher percentage of fruit sets (74.4 %) compared to self-pollinated (43.4 %) and open (3 %). The index of self-incompatibility (ISI) indicates partial self-incompatibility. Due to the probable loss of pollinators or the lack of efficient pollinators, the natural population of <em>B. lanzan</em> has not yet been restored. To achieve the required fruit or seed set cross-pollination facilitated by humans would be a feasible technique. Therefore, to prevent the extinction of this species, human management is required in terms of cross-pollination. As a result, the scientific knowledge produced by the current study may prove helpful in various breeding initiatives and the preservation of this medicinal plant species. Further, this knowledge forms the basis for taking measures for the conservation and management of forests.</p></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139409348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Foliar non-structural carbohydrates and resprouting ability of woody species in a tropical dry forest","authors":"Ellen Baião ,&nbsp;Wanessa S. Carvalho ,&nbsp;Fernanda M.P. Oliveira ,&nbsp;Jakelyne S. Bezerra ,&nbsp;Mariana Santos ,&nbsp;Mauro G. Santos","doi":"10.1016/j.flora.2023.152436","DOIUrl":"10.1016/j.flora.2023.152436","url":null,"abstract":"<div><p>Diverse disturbances contribute to biomass loss in tropical dry forests (TDF), of which slash-and-burn agriculture (SBA) may be the most severe; it is practiced by large populations of residents. Plant species capable of resprouting in response to such disturbances often possess above-ground structures that survive and mobilize resources for resprouting, in addition to below-ground structures. In Brazilian TDF, woody species regenerating from stem pieces that persist after SBA events are common. In this study, we evaluated the foliar concentrations of non-structural carbohydrates (NSC) and mineral nutrients during the first six months after an SBA event in all species that resprouted within the experimental area. Almost all the species resprouted exclusively from the stems. The measured nutrient concentrations did not change drastically after an SBA event. Two patterns were observed with respect to NSC concentrations among the species. Half of the studied species exhibited high concentrations of NSC before the SBA event, which gradually decreased three and six months after the disturbance. In contrast, the remaining species maintained consistent NSC concentrations throughout the study period. The cost of building new leaf tissue was similar for all species before the SBA event. However, after disturbance, the species invested different amounts of carbon into the new leaves. Those species that decreased NSC leaf concentration after SBA showed the highest regrowth intensity through the number of new tillers. Our results suggest that the intense translocation of NSC from the leaves before SBA may support the increased activity of the buds present in the remaining stem piece.</p></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0367253023002256/pdfft?md5=017ca12b62a8321f0e241baeec98f1c2&pid=1-s2.0-S0367253023002256-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138546758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative morpho-anatomy of the sporophyte of the most austral American species of Didymoglossum (Polypodiopsida: Hymenophyllaceae)","authors":"María Gabriela Romagnoli ,&nbsp;Patricia L. Albornoz ,&nbsp;Marcelo D. Arana","doi":"10.1016/j.flora.2023.152440","DOIUrl":"10.1016/j.flora.2023.152440","url":null,"abstract":"<div><p><em>Didymoglossum</em> (Hymenophyllaceae) is a monophyletic genus that includes small, epiphytic or epilithic plants. Three morphologically very similar species are found in the southern sector of the Yungas and Parana forests: <em>D. hymenoides, D. krausii</em> and <em>D. reptans</em>. The aim of this research was to characterise the morphoanatomy to better delimitate the taxa. Also, to evidence the presence of fungal endophytes. Conventional histological techniques were applied to fresh and FAA-fixed material. The anatomical structure of the different organs, in the three species, is similar; with collateral protostelic rhizomes, covered with simple or branched rhizoids; stipes teretes with glandular trichomes; uniestratified laminae formed by epidermal cells, with collateral vascular bundles; false veins formed by macrosclereids and stegmata or only by macrosclereids. The eglandular and glandular trichomes on the lamina differ in the species studied. The basal and middle portion of the involucre are pluristratified, with a vascular bundle at each margin, while the apical portion is formed by a one layer of epidermal cells; the receptacle is pluristratified with glandular trichomes on its surface. The presence of stegmata, collenchymatous tissue, sclerenchyma, mucilage fibers in phloem, pores in lamina and cuticle on the epidermis is evidenced and reported. Septate fungal endophytes were observed in epidermal cells of the rhizome, stipe and lamina of <em>D. krausii</em> and <em>D. reptans</em>. Species are differentiated by the following characters: shape of the lamina, diameter of the rhizome, number of false veins and the types of trichomes and pores. A key for the studied species is presented.</p></div>","PeriodicalId":55156,"journal":{"name":"Flora","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0367253023002293/pdfft?md5=d36c5a0fb805a8f7d05ac0daa641821b&pid=1-s2.0-S0367253023002293-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139016637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}