Background and aims: The green reproductive organs are photosynthetically active and, in the case of cereals can contribute to crop yield. In wheat and other cereals, this contribution has received greater attention in recent decades. The green parts of the ear possess some advantages over leaves, such as a lower decrease in photosynthetic rate under drought conditions. This...
Joaquín Frenguelli was a passionate naturalist who cultivated diverse branches of the natural sciences. In Paleobotany, he is recognized for his research on Patagonian Paleozoic and Mesozoic floras; however, he is less known for his work on Cenozoic angiosperms, including his pioneering work on the fossil record of she-oaks, eucalypts, and the Proteaceae. He did not choose these...
Background and aims: Genera of Asteraceae, belonging to different tribes, present a repeated pattern of morphological adaptations to epiornithochory and have unique distributions. This pattern requires the interplay between plant morphology and environmental aspects (ecomorphology), and between morphology and the evolutionary history. Adenostemma and Adenocaulon are investigated...
Background and aims: In this contribution the aim is to present the first record of Pteris propinqua from Argentina for the first time, based on specimens found in the department of Iguazú, Misiones.M&M: The specimens were deposited in the CTES and LP herbaria. Updated bibliography were used for species identification. SEM was used to illustrate the spores.Results: The...
Background and aims: Caperonieae and Ditaxeae (Euphorbiaceae) comprise approximately 130 species and are widely distributed in the New World, except for seven Caperonieae species that occur in Africa. Both tribes are well characterized morphologically and are monophyletic. The tribe Caperonieae is monogeneric, and Ditaxeae comprises two genera: Argythamnia and Chiropetalum. After...
Background and aims: Corynabutilon salicifolium (Reiche) Krapov. (Malvaceae) is an endemic shrub of the Mediterranean-temperate transition zone of central Chile, currently classified as Critically Endangered. This study reports a new locality in Parque Lastarria (Loncoche municipality) and characterises the habitat of a previously known population in Cerro Maulén (Gorbea...
Background and aims: Lichenized fungi are key components of Andean-Patagonian forests due to their role in nutrient cycling and their high epiphytic diversity. Among them, Pseudocyphellaria-one of the largest genera in Lobariaceae-is characterized by foliose thalli with pseudocyphellae, which generate microhabitats suitable for tardigrades. These microinvertebrates contribute to...
EditorialVolumen conmemorativo 80o aniversario del Boletín de la Sociedad Argentina de BotánicaGonzalo J. Márquez1 Josefina Bodnar2 1 Vicedirector del Boletín de la Sociedad Argentina de Botánica desde 2025. Museo de La Plata, La Plata, Argentina. cosme@ fcnym.unlp.edu.ar2 Directora del Boletín de la Sociedad Argentina de Botánica desde 2024. Facultad de Ciencias Exactas y...
Background and aims: Building living fences at home is a common practice worldwide. However, little is known about the selection criteria and trade of ornamental species for this purpose. This study surveyed the richness of species sold for fences in nurseries in Comodoro Rivadavia, the attributes related to their differential importance, and their invasive potential.M&M: The...
Background and aims: Biological invasions are one of the leading causes of biodiversity loss and ecosystem degradation. However, the number of exotic and invasive species continues to increase globally, and Argentina is no exception. In this study, the presence of Enneapogon cenchroides, an Afro-Asian grass, is documented for the first time in Argentina. Information is provided...
Background and aims: This work is a contribution to the knowledge of Capparidastrum coimbranum in Argentina, a little known tree species recorded only in the Yungas of the north of Salta Province (Sierras de Alto Macueta and del Alto Río Seco). The present study aims to provide a description of the material corresponding to C. coimbranum collected in the Sierras de Alto Macueta...
Background and aims: In cities there are epiphytic plants that live on trees, representing an important component of urban plant diversity. However, in general it is unknown which are the ecological factors that maintain the diversity of epiphytes in this environment. The objective of this study was to analyze the tree factors related to the richness of epiphytes in an urban park...
Background and aims: The study of spontaneous species in the southeast of Buenos Aires Province with food potential is approached from the knowledge of the community and nutritional assessment, with the objectives of presenting an updated list of species, inquiring about knowledge associated with them and offering a nutritional profile of selected species.M&M: A list of species...
Background and aims: The Rubiaceae family has not had any updates on its distribution within the Iberá macrosystem for over 20 years. This study aims to update the species inventory and their distributions, highlight diagnostic characteristics, and identify knowledge gaps.M&M: Based on Flora del Iberá and the analysis of label data and the morphology of herbarium specimens...
Background and aims: The Tandilia rangelands represent sites of high bio and geodiversity, however, plant communities are threathened by invasión of exotic species. This study aims to characterize and compare the floristic composition and richness of the different geoforms on northeastern and southwestern slopes in two hills in the districts of General Pueyrredon and Balcarce...
Background and aims: The “Los Pantanos de Villa" Wildlife Refuge is a representative sample of the wetlands of the South American Pacific arid coast; however, its exotic flora remains unknown and may threaten the ecosystem. This work aims to identify the presence and distribution of exotic shrub-arboreal species in the wetland, to analyze their relationship with native plant...
Background and aims: Plebeia mansita is a species of bee endemic to the Yungas, whose colonies live in the hollows of living trees. To know the botanical resources that contribute to the diet of their hives, palynological studies of pollen reserves are used.M&M: The subsamples were collected in November 2021 from hives raised in technical boxes located in the towns of Valle...
Background and aims: Certain species of fungi can induce hallucinations due to compounds like psilocybin, and many studies have explored their potential as treatments for various conditions. This work aims to describe and illustrate two species of hallucinogenic fungi from northeastern Argentina (NEA): Panaeolus cyanescens and Psilocybe cubensis.M&M: The specimens were collected...
Background and aims: Heavy metals pollution, particularly by hexavalent chromium, is a topic of global concern due to its high toxicity and environmental persistence. Phytoremediation emerges as a nature-based economic technology for the recovery of environments contaminated by metals. In the case of water bodies, aquatic macrophytes such as Salvinia minima Baker are excellent...
Background and aims: To our hypothesis on the evolutionary relationships of Cheilanthoid ferns, based on molecular data and partially on morphological and reproductive data, we add here a study of root anatomy in the genera of the subfamily occurring in South America.M&M: Root characters were analyzed anatomically in 48 South American species representing the 12 genera of...
Background and aims: In this work, the ferns and lycophytes of the Paisaje Protegido Cerro Mbororé, Oberá, Misiones, Argentina are studied. The phytogeographic importance of the area is discussed, since it is located in the transition between the District of the Mixed Forests and the District of the Fields, in the Amazonian Domain from the country.M&M: The collected materials...
Background and aims: Our research on neotropical Selaginella led us to examine a collection from the Atlantic Forest of Serra do Peito-de-Mopa, Bahia, Brazil, initially determined as S. muscosa but with unusual features, indicating it represented an undescribed species. We also reexamined the taxonomic and nomenclatural status of three Selaginella taxa previously described from...
Background and aims: The plant's roots and fungi establish symbiotic endophytic associations that can coexist: arbuscular mycorrhizae and “dark septate” endophytes. Ferns and lycophytes are vascular plants that can form both fungal symbioses. The objective of this work is to detect the presence of fungal root endosymbiosis, know the mycorrhizal status, and analyze the type of...
Background and aims: The Tandilia system is a fundamental refuge for a highly diverse biota throughout the wide climatic variability of the mid-late Cenozoic that affected the Pampean steppe, especially for fern and lycophyte flora. The geology and proximity to the sea in the southeast of the Tandilia system raise questions about the composition and biogeographical affinities of...
Background and aims: The status of the presence of arbuscular mycorrhizal fungi (AMF) in lycophytes and ferns has been analysed in 11% of them. This work aims to characterise and quantify the AMF colonisation and to characterise septate endophytes present on the roots of the Thelypteridaceae: Amauropelta jujuyensis, A. nubicola, and Pelazoneuron patens.M&M: Ten individuals per...