Floristic Inventory Research Articles

Vegetation profile and ecological traits in irrigated plains of semi-arid regions: A case study of Okara, Punjab Pakistan

Comprehensive botanical assessments are pivotal for understanding the intricate world of plant biodiversity. These assessments serve multifaceted purposes, from cataloging significant plant species within a region to aiding in conservation, monitoring protected areas, and providing valuable data for various scientific disciplines. The primary objective was to assess the vegetation profile and ecological traits in this region, conduct a comprehensive floristic inventory, categorize species, and investigate adaptability to semi-arid conditions within the irrigated plains of Okara, Punjab, Pakistan. Comprehensive botanical assessments were conducted to document the floristic composition and ecological characteristics of the region. A total of 135 plant species, belonging to 118 genera and 46 families, were identified. Notably, Poaceae and Fabaceae were the most prominent families. The study revealed diverse growth habits, with herbaceous plants being the most abundant. Life form analysis indicated Therophytes as the dominant category, and Microphylls were the most prevalent leaf type. Flowering phenology analysis highlighted two major flowering periods, primarily influenced by plant habit and size. Habitat-wise distribution demonstrated variations in species preferences, with unique associations observed in forest, vegetable, maize, paddy, and mustard fields. Invasive species accounted for 16.93% of the flora, with several herbs, shrubs, and trees identified as invasive. These findings contribute valuable insights into the botanical diversity and ecological traits of the Okara region, with implications for biodiversity conservation and land management strategies.

Habitat and Population Structure of Five Multipurpose Species in Forest Management Site of Tiogo, Burkina Faso

Understanding the dynamics of multipurpose species in savanna ecosystems is essential for their sustainable conservation. This study aims to assess the population structure of five target species (<i>Tamarindus indica,</i> <i>Vitellaria paradoxa,</i> <i>Detarium microcarpum</i>, <i>Anogeissus leiocarpa,</i> and <i>Crossopteryx febrifuga</i>) in the forest management site of Tiogo. Floristic inventory was conducted on 100 plots of 1000 m2. Non-Metric Multidimensional Analysis was carried out to characterized the target species’ habitats. A total of 70 species distributed in 23 families and 55 genera were recorded. Four groups of overlapping plant communities were identified. Each group constitutes a habitat of target species with diverse ecological drivers. Weibull distribution showed an overall good population structure for <i>Vitellaria paradoxa</i>, <i>Detarium microcarpum</i> and <i>Crossopteryx febrifuga</i>. However, <i>Tamarindus indica</i> and <i>Anogeissus leiocarpa</i> showed bad regeneration potential with lack of recruitment in the smaller diameter size classes. It is therefore important to increase the monitoring in the forest management site. This work has provides valuable information for better management of target species, aiding in effective forest management of Tiogo, subject to anthropic pressures.

Taxonomic study of Senna section Chamaefistula series Bacillares (Fabaceae) in the Atlantic Forest north of the São Francisco River, Brazil, and nomenclatural updates

Senna section Chamaefistula series Bacillares (Benth.) H.S.Irwin & Barneby comprises ~50 Neotropical legume species occurring in both tropical and subtropical areas. Approximately 25 of those species occur in Brazil, with nine being endemic. This work provides a taxonomic study of Senna section Chamaefistula series Bacillares in the Atlantic Forest north of the São Francisco River in north-eastern Brazil, which is considered a global hotspot for biodiversity, contributing to understanding their taxonomy, diversity and distribution, as well as analysing morphological variations that have led to identification errors in the past. Fieldwork was conducted to make observations and collect fresh material; specimens from national and international herbaria were also examined. Senna section Chamaefistula series Bacillares is represented in the study area by nine species (of which four are endemic to Brazil), including S. pluribracteata F.S.Souto & R.T.Queiroz, a species recently described for the area. All species of the series known from the study area are described and illustrated and a key is provided. Additionally, four names were typified, with two lectotypes and two neotypes being designated here. The results have reinforced the importance of conducting floristic inventories for documenting new species and new occurrences.

Uncovering the complex relationship between plant diversity, soil properties, and mycorrhizal inoculum potential in threatened Miombo woodlands

AbstractArbuscular mycorrhizal fungi (AMF) are key members of soil microbial communities and play a key role in regulating ecosystem processes. However, the mutual interdependence of plants and AMF in threatened Miombo woodlands has not yet been fully elucidated. In this study, we investigated the relationship between plant ecological indicators and soil mycorrhizal inoculum potential (MIP) in the Miombo forest fallow of Haut‐Katanga, Democratic Republic of Congo, and identified plant species that positively influence soil MIP. We conducted a floristic inventory on 32 plots and collected soil cores for physicochemical and AMF characterization. Trap cultures using Crotalaria juncea seedlings were performed to determine the soil MIP. We also tested the AMF colonization status of randomly collected living roots of mature woody and dominant herbaceous species to identify explanatory variables for MIP. Our results showed that MIP was twice as high in silty clay soils (63.13%) than in clay soils (30%). Furthermore, MIP increased accordingly with the relative abundance of a group of woody and herbaceous species (e.g., Albizia adianthifolia, Baphia bequaertii, and Setaria pumila) and decreased with others (e.g., Combretum collinum, Harungana madagascariensis and Hyparrhenia diplandra). Linear regressions showed that MIP increased significantly with the specific richness of woody species identified as indicators and with the amount of annual herbs. Woody legumes with high root colonization by AMF appeared to be refuge plants, and primary AMF dispersal vectors, increasing soil MIP. This study provides baseline data that can be used to formulate ecological restoration strategies, including soil and vegetation protection.

Barnadesieae, Gochnatieae, Mutisieae and Nassauvieae (Asteraceae) in the Atlantic Forest of Caparaó National Park, Brazil.

Asteraceae is highly diverse in the Atlantic Forest, especially in montane environments. The early-diverging tribes within Asteraceae are of particular interest because of their great representation in Brazil and unique features within the family. Thus, a floristic inventory and systematic treatment of these basal grade in Caparaó National Park, an important remnant of Atlantic Forest that has been highlighted for its diversity and endemism, were undertaken. The study was conducted by examining specimens from representative collections of Caparaó and a field expedition. A total of 15 species were found, representing six genera and four tribes, with Mutisieae and Nassauvieae being the most representatives. Six of the species have restricted distributions, either to Brazil (3 spp.), the Atlantic Forest (2) or Caparaó mountain (Mutisia lutzii). Three new records were documented for the park, namely Chaptalia integerrima, Moquiniastrum polymorphum and Mutisia coccinea. Floristic inventories and systematic treatments can make great contributions to science by bringing a better understanding our biodiversity and providing relevant information about flora for the conservation of priority areas.

Impact of Human Activities on Woody Vegetation in Gallery Forests in the Mandara Mountains (Far North, Cameroon).

This study was conducted in the Mandara Mountains in Cameroon and aimed to assess the effects of human activities on woody vegetation in gallery forests, based on floristic inventories and observations made by the government. Firstly, the inventories were carried out in 150 plots of 1000 m2 each, installed on the banks of watercourses following the band of plant formations. In each plot, woody species were counted and those showing at least one sign of degradation were noted. Secondly, the survey was conducted in 18 administrative structures made up of delegations (MINFOF, MINADER, MINEPDED, and MINEPIA) and town halls. One hundred woody species, grouped into 63 genera and 30 families, have been inventoried, in which 45 species showed at least one sign of damage caused by human being. The species most affected are Anogeissus leiocarpus (67 stems), Azadirachta indica (46 stems), Diospyros mespiliformis (43 stems), Acacia albida (42 stems), Andira inermis (30 stems), Acacia sieberiana (23 stems), Khaya senegalensis (19 stems), Ficus sycomorus (13 stems), and Acacia polyacantha (10 stems). The most recurrent activity in the gallery forests is pruning (212 stems), followed by cutting (93 stumps), then picking (71 individuals). However, there are fewer debarked trees (11) and trees with fire trail (6). According to the responses provided, logging (77.78%), agriculture (72.22%), population growth (44.44%), grazing (33.33%), and bush fires (33.33%) are the main causes of the degradation of plant formations in the Mandara Mountains. These main factors could have a negative impact on biodiversity if appropriate integrated management measures are not taken. To maintain these vital ecosystems, an integrated management plan must be put in place, limiting human activities to a minimum.

IMPACT OF URBANISATION ON THE AVAILABILITY OF FOOD PLANTS IN THE TOWN OF BOUAFLE (CENTRAL-WESTERN COTE D'IVOIRE)

In a world that is becoming increasingly urbanised, the thorny problem of feeding urban populations is a pressing one. However, the introduction of food plants is not taken into account in the urbanisation politics of localities in Côte d'Ivoire. This study, carried out in the town of Bouaflé, has improved knowledge, conservation and development of the food species found in urban environments. The types of development were the sites inventoried. The surface survey method was combined with the itinerant method during the floristic inventories. A total of seventy (70) food plants divided into 56 genera and 35 botanical families within eight (8) types of development have been identified. Dwellings had the highest number of food plants, with 50, followed by public buildings, with 49. The Solanaceae family is the most represented, with 11% of plants. Similarly, micro phanerophytes and introduced species are the taxa most commonly found in these landscapes. Arborescents species are the most numerous in all types of planting, with proportions ranging from 50% to 66.67%. Preferred food plants, which are very frequent and abundant, are the most numerous, accounting for 71.43% of all food plants. Thus, the priority given to ornamental plants for embellishing and recreating populations is the factor that limits the presence of food plants in the town of Bouaflé.

Floristic Inventory and Diversity Assessment at Two Locations along the Shores of Cape Coast, Ghana.

Coastal vegetation plays significant roles such as stabilization of the surface against wind and erosion, and provision of critical terrestrial and aquatic habitats for organisms. Floristic studies serve as a way of monitoring and evaluating the health of ecosystems. Currently, information on the floristic composition and diversity along the shoreline of Cape Coast is scanty. The study was aimed at assessing the impacts of anthropogenic activities on plant biodiversity along the shoreline of Cape Coast, Ghana. Thus, the study analysed the biodiversity of plants at the Hutchland beach (a disturbed area) and the Asasse Pa beach (a fairly undisturbed area). It was hypothesised that the Asasse Pa beach had a higher species diversity than the Hutchland beach. An inventory was made of all plant species found at both locations. A belt transect method was used for the ecological study, involving the use of a 1 m2 quadrat. All the plants that were found in each quadrat were identified, and the species and number of individuals of each species were counted-this information was used in the determination of the ecological parameters of the species and the locations. Parameters between the two locations were compared with a t-test, whereas variations in the distribution of the species were determined with principal components analysis (PCA), using Minitab and R statistical software, respectively. A total of 50 plant species belonging to 48 genera and 23 families were inventoried along the shoreline. The family Poaceae had the highest number of species, 10. The Asasse Pa beach had a higher species diversity and evenness of 2.84 and 0.84, respectively, whereas the Hutchland beach had a lower species diversity and evenness of 2.44 and 0.75, respectively. Anthropogenic activities at the Hutchland beach might have accounted for the lower species diversity and evenness there. The study therefore recommends periodic monitoring of coastal vegetation also law enforcement on coastal resources.

Checklist Birds of Wetlands in south-western Sicily (Italy): Capo Feto and Pantano Leone

Over the years the importance of checklists as indispensable basic knowledge instruments in the correct management of Sicily’s natural heritage has been reinforced by the requests contained in international conventions on biodiversity especially by the need to implement the Habitats Directive. Today’s growing interest in biodiversity makes it essential that inventories of fauna and flora are compiled and kept up to date for each individual region to serve as an initial, indispensable knowledge base. In this paper, a first detailed (and, partly, commented) checklist of the waterbirds, diurnal raptors species of two naturalistic areas in Sicily (Italy) is presented. Regarding the Capo Feto (Mazara del Vallo) wetland, the checklist includes 94 species of waterbirds and birds of prey, As far as the Pantano Leone (Campobello di Mazara) wetland is concerned, the checklist includes 73 species of waterbirds. Capo Feto is a nationally important site for the Kentish Plover, an endangered species (EN) on the IUCN Red List of Threatened Species that nests there. Pantano Leone is a nationally important site for the overwintering of Common snipe.

A comprehensive floristic knowledge of a fragment of Semideciduous Seasonal Forest [Parque Estadual da Serra da Concórdia], Rio de Janeiro, Brazil.

The "Serra da Concórdia" is part of the Atlantic Forest phytogeographical domain in the Brazilian state of Rio de Janeiro and it has a predominant phytophysiognomy of Semideciduous Seasonal Forest. This region underwent intense habitat loss and fragmentation during the 19th century, due to coffee plantations and later pastures. With the decline of these activities, the areas were abandoned, triggering secondary succession. In 2002, the "Parque Estadual da Serra da Concórdia" was established in this region to preserve the remaining forest fragments. The updated list of vascular plants recorded in this protected area, published in the "Catálogo de Plantas das Unidades de Conservação do Brasil", is presented here, along with information on richness, endemism, and conservation status. The "Parque Estadual da Serra da Concórdia" houses 231 vascular plant species, of which 90% are angiosperms, 10% ferns and lycophytes, and 27% endemic to the Atlantic Forest. Ten species are threatened with extinction, three are categorized as Endangered, and seven as Vulnerable. Although there have been expeditions in the "Parque Estadual da Serra da Concórdia", they have been limited, resulting in a low number of records and the species richness for a protected area. This is notable considering the 2,130 Brazilian native vascular plant species recorded in the semideciduous seasonal forest of Rio de Janeiro. Our data indicates that floristic inventories of Brazilian protected areas could help highlight gaps in flora knowledge and support the proposal of effective conservation actions.

Floristic inventory of Melastomataceae of the Iguaçu National Park, Paraná, Brazil

Abstract Melastomataceae is one of the richest families in Brazil, with 1,436 species, 158 occurring in the state of Paraná. Many of the species are pioneers and zoochoric, essential for regeneration and floristic composition of the Atlantic Forest, which is the phytogeographic domain covering the Iguaçu National Park (ParNa Iguaçu). We present the floristic inventory of Melastomataceae of ParNa Iguaçu. Three areas in the park were sampled from May 2019 to March 2020, where two are covered with Seasonal Semideciduous Forest (SSF), and the other in a transition between SSF and Mixed Ombrophilous Forest (MOF). Seventeen species of Melastomataceae in four genera were recorded: Miconia (14 spp.), Acisanthera, Chaetogastra, and Pleroma (with only one species each). Seven species occur in the two vegetation types in ParNa Iguaçu, while six occur only in MOF and four only in SSF. Of the 17 species, six are endemic to Brazil, four of which occur only in the south and southeast regions of the country. This study registers nine new records for the ParNa Iguaçu. Furthermore, the Miconia leaeichleri was collected for the first time in the western region of Paraná, which suggests the necessity for more collection efforts in the western region of the state.

Potential application of GBIF platform for flora inventory of Karaganda region

The current biodiversity inventory has important scientific and practical implications for the country. In Kazakhstan, data on the flora of spore and vascular plants are outdated; there is a significant gap in assessing the current species composition of certain regions of Kazakhstan, including Central Kazakhstan (Karaganda and Ulytau regions). The problems of formation of a modern flora abstract are determined by the need to use the entire volume of accumulated information, both for individual findings of naturalists and multi-year collections in domestic and international herbarium collections. When carrying out research to analyze the current state of the flora of Karaganda region, the GBIF platform resources containing information on the biological diversity of flora and fauna were used. Data analysis showed that the platform has more than 130 thousand records of vascular plant finds for the territory of Kazakhstan, including 2241 records for Karaganda region with geo-referencing. The main funds containing the largest number of collections made on the territory of our region were determined. The stages of data processing and geo-linking of herbarium collections are defined. In general, a high potential for supplementing field collections with GBIF data to clarify the distribution of individual taxa and make range maps was determined.

Floral Richness And Seasonalityof Phytodiversity In The Tessala Mountains, Western Algeria

This work is devoted for the floral richness and seasonality evaluation of the plant communities of the Tessala Mountains in Western Algeria. The floristic inventory of the 30 surveys carried out on 10 selected stations has resulted in 152 species under 125 genera and 48 families. Seasonal floral richness is concentrated in both spring and summer seasons, while the monthly richness is significant between Marchto August. Vegetations formations are represented physiognomically by four strata, taken into consideration in descending order of importance: Herbaceous (68%), shrubby (12%), arbustive (11%), and arborescent (10%). The overall and seasonal distributions of biological types almost follow the diagrams: Therophytes (The)> Hemicryptophytes (Hem)> Phanerophytes(Pha) > Chamephytes (Cha)> Geophytes (Geo). During the two season: the winter and the spring, the annual herbaceous dominate the bio-morphological spectrum with perennial herbs. During the summer and autumn, perennial herbaceous plants dominate the bio-morphological spectrum. The families that are mostexisting overall and during the four seasons are Asteraceae, Poaceae, Lamiaceae and Fabaceae. Bangladesh J. Plant Taxon. 30(2): 233-248, 2023 (December)

FLORISTIC INVENTORY AND ANNUAL AVAILABILITY OF MELLIFEROUS FLORA IN CERVANTES Y LOZADA, CORDOBA MUNICIPALITY, VERACRUZ, MEXICO

Pollinators depend on the melliferous flora for food, in return, flowers are pollinated, which contributes for the maintenance of ecosystems and conservation of biodiversity, increasing food production and ensuring food security. This research aims to provide an inventory of melliferous flora and its annual availability in Cervantes y Lozada, Córdoba, Veracruz, Mexico. During 26 months, the plants interacting with bees were collected on defined rural roads; we also documented the resource provided by the flowers (pollen, honey, etc.), their origin (native or exotic), life form and flowering periods. From 122 collections, 76 melliferous species were inventoried, grouped in 74 genera and 35 botanical families, being Asteraceae (25 %) the family with more species, followed by Malvaceae (9.21 %) and Lamiaceae (7.89 %); 67.11 % are polliniferous, 7.86 % nectariferous, and 25 % provide both; 82.89 % are native and 17.11 % exotic; 15.79 % are trees, 28.95 % shrubs and 55.26 % herbs. Seven species provided resources for bees all year round, two for 10 months and the rest for shorter periods. The flora species that were inventoried have different uses, so it is important to protect and promote the sustainable management of the melliferous flora, which is essential for the conservation of the pollination service, which in turn is essential for agriculture and ecosystems, in addition to protecting species of social, ecological, and economic importance.

Floristic inventory and ecological diversity of algal flora of Lotkuh District Lower Chitral, Khyber Pakhtoon Khwa, Pakistan

Floristic inventory and ecological diversity of algal flora of Lotkuh District Lower Chitral, Khyber Pakhtoon Khwa, Pakistan

Influence of Fire on Floristic Diversity and Herbaceous Production in the Ollombo Savannahs in the Republic of Congo

The Loudetia simplex (Nees) C.E. Hubb. savanna and the Hyparrhenia diplandra (Hack.) Stapf savanna are the main savannas in the Ollombo area of the Republic of Congo. The functioning of these savannas is influenced by the different types of fire. The aim of this study is to assess the influence of fire on the floristic diversity and herbaceous production of the savannahs in the Ollombo area. The floristic inventory and phytomass measurements were carried out at the peak of vegetation before the fires and at 2 and 10 months after the fires. The floristic inventory was carried out using the aligned quadrat points method. The data from this inventory were used to calculate diversity indices, including the Shannon-Weaver index (H'). Above-ground herbaceous phytomass was assessed using the harvesting method. The results show that floristic diversity and herbaceous above-ground phytomass vary from one type of fire to another and from one type of savannah to another. In the Loudetia simplex (Nees) C.E. Hubb. savannah, seasonal fire (H'=2.69) and late fire (H'=2.43) appear to favour floristic diversity at 2 and 10 months after burning, respectively. In the Hyparrhenia diplandra (Hack.) Stapf savannah, on the other hand, only early fire seems to favour floristic diversity two months (H'=2.7) and 10 months (H'=2.4) after burning. In terms of herbaceous above-ground phytomass, seasonal fire (0.82 ±0.07 t DM/ha) and early fire (6.49 ±1.06 t DM/ha) appear to increase herbaceous production at 2 and 10 months after burning, respectively, in the Loudetia simplex Nees C.E. Hubb. savannah. On the other hand, late burning (0.88 ±0.07 t DM/ha) and early burning (6.98 ±1.01 t DM/ha) appear to increase herbaceous production at 2 and 10 months respectively in the savannah with Hyparrhenia diplandra (Hack.) Stapf. These results could serve as a scientific basis for the sustainable management of pastures by fire and as a benchmark for future studies.

A floristic inventory of vascular plants growing wild in the Naples Botanical Garden and on immediately adjacent land (Collier County) Florida, U.S.A.

A floristic inventory of vascular plants growing wild in the Naples Botanical Garden and on immediately adjacent land (Collier County) Florida, U.S.A.

Fabaceae Lindl. in the Chapada do Araripe, Northeast Brazil

The Brazilian plateau known as Chapada do Araripe is home to several types of vegetation and a diversity of native species. This plateau is located among the Brazilian states of Ceará, Pernambuco, and Piauí, in the Northeast region. This study consisted of a floristic inventory of Fabaceae species prevailing in different environments of the mentioned plateau. Monthly botanical expeditions were performed from October 2021 to November 2022; these occurred at previously selected sites. The plant collection, herborization, and identification of the species were carried out according to the specialized literature, and the specimens were deposited in the Herbário Caririense Dárdano de Andrade-Lima (HCDAL). A total of 194 species, 11 infraspecific taxa, and 81 genera belonging to five subfamilies were listed. These numbers represented approximately 32% of the diversity of Fabaceae recorded in Brazil, and an increase of approximately 115% in the number of species previously recorded in the Chapada do Araripe. The most diverse subfamilies were Caesalpinioideae and Papilionoideae, with 90 and 89 species, respectively. The most representative genera were Senna (19 spp.), Chamaecrista (15 spp.), and Mimosa (14 spp.). Thirteen species and three varieties were new records in Ceará state. The predominant growth habit was tree type, recorded in 44% of the species (86), and the main habitats were Steppe Savannah, Savannah, and Wooded Steppe Savannah. Thirteen species are endemic to the Caatinga phytogeographic domain: Copaifera arenicola, Copaifera cearensis, Hymenaea cangaceira, Cenostigma microphyllum, Mimosa caesalpiniifolia, Mimosa misera, Parapiptadenia zehntneri, Pithecellobium diversifolium, Senna cearensis, Senna gardneri, Senna lechriosperma, Crotalaria holosericea e Luetzelburgia bahiensis. Regarding the status of species protection and conservation, most are in Least Concern status (48.8%), four are Near Threatened (Hymenaea cangaceira, Pterogyne nitens, Dalbergia cearensis, Parapiptadenia zehntneri), two species are in Vulnerable status (Melanoxylon brauna and Senegalia cearensis), one species did not have enough data for assessment (Copaifera cearensis), and one is Endangered (Amburana cearensis). The findings of the present study can support conservation strategies, and ecological and phytosociological studies, among others. Also, it can be used for planning and promoting environmental education. Such information is valuable for the conservation of biodiversity and sustainable management of natural resources of the Chapada do Araripe.

Cedar vascular flora of Djebel Maadid. Floristic analysis – Conservation

The study region belongs to Cedrus atlantica Manetti formation, which is a North Africa endemic species. It is situated at Djebel Maadid, southern Bordj-Bou-Arreridj province, Algeria. To preserve this community, a flora inventory is important. We adopted a systematic-subjective non-probability sampling method in 30 surveys. The results revealed 108 species distributed among 91 genera and belonging to 34 botanical families. The analysis, including similarity and detrended correspondence analysis, identified various groups of plants-samples that demonstrate different environmental states linked to distinct stationarity. The species richness in particular sites can play a local role in the in-situ conservation of plants and habitats and must be registered for an urgent awareness situation.

The flora of the island of Rivanj and the vegetation of the macchia and forest of Rivanj and the Sestrice islets

According to literature data and field research conducted in 2019 and 2020, there are 346 vascular native and non-native taxa with the ability to survive outside crops (309 species, 36 subspecies and varieties) on the island of Rivanj (3,615 km2). Including 84 taxa in cultivation, we state that the total flora of Rivanj numbers 430 taxa. Those in cultivation are not included in the flora analysis. During earlier research, 45 taxa were recorded, while 385 taxa are listed for the first time in this work. In addition to the flora inventory, a taxonomic, ecological and phytogeographical analysis was performed. The results are presented in Tables 1–4 and Figure 2. The composition of the flora is dominated by angiosperms, in which dicotyledons (73.99%) are significantly more common than monocotyledons (23.99%). The flora also includes two ferns and 5 gymnosperms. By the number of taxa, the most represented families are Poaceae (13.01%), Asteraceae s.l. (11.85%) and Fabaceae (8.96%). The spectrum of life forms is dominated by therophytes (43.93%) and hemicryptophytes (24.28%), while plants of the Mediterranean floral element (42.77%) dominate in the phytogeographical analysis, which indicates the climatic conditions and geographical position of the island of Rivanj. Four endemics and four endangered taxa (Lathyrus ochrus – critically endangered, Carex extensa – endangered and two vulnerable taxa: Orchis tridentata and Parapholis incurva) were recorded in the flora, as well as five orchid. Eleven invasive taxa were recorded in the weed and ruderal vegetation of the settlement (3.18% of the total flora of the island). The investigation of the macchia and forest vegetation of the island of Rivanj and the islets of Sestrice was conducted in 2019 and 2020. The relevés were produced and analyzed according to the Braun-Blanquet method. Thirty relevés presenting the vegetation of the Quercetea ilicis and Pinetea halepensis classes were statistically analyzed and their dendrogram created. The results are shown in Tables 5–7 in accordance with the classic presentation regarding phytosociological relevés. Through the syntaxonomic analysis the Erico arboreae-Arbutetum unedonis Allier et Lacoste 1980 ex Foggi in Foggi et Grigioni 1999, Myrto communis-Pistacietum lentisci (Molinier 1954) Rivas-Martínez 1975, Pistacio lentisci-Juniperetum turbinatae Trinajstić 1987 ex Asensi, Díez-Garretas & Quézel 2007 and Myrto communis-Quercetum ilicis (Horvatić 1963) Trinajstić (1976) 1985 associations from the Quercetea ilicis class and the Pistacio lentisci-Pinetum halepensis De Marco, Veri & Caneva 1984 association. The autochthonous macchia and forest vegetation is mostly endangered by planted community of Aleppo pine on the islet of Mala Sestrica and on smaller areas on the island of Rivanj. North-west of the settlements on the Rivanj island a thick and impassable macchia grows. It is necessary to clear out the firefighting access paths and ban all activities that might cause fire.