Gayana Botanica <p><strong>GAYANA BOTANICA</strong>, dedicated to the French naturalist Claude Gay, is a journal for the rapid publication of original research in all areas of the biology of plants and fungi.</p> <p><strong>WoS Impact Factor:</strong>&nbsp; <strong>0.705</strong> (2019)&nbsp; 0.531 (5 years)</p> <p><strong>SciELO</strong> (Scientific Electronic Library Online): <a href="" target="_blank" rel="noopener"></a></p> Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción en-US Gayana Botanica 0016-5301 <p>Authors who publish with this journal agree to the following terms:</p> <ol> <li class="show">Authors retain copyright and grant the journal right of first publication.</li> <li class="show">The articles in this journal are published under <a href="" target="_blank" rel="noopener">Creative Commons Attribution-NonCommercial 4.0 International License</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li> <li class="show">Authors are permitted and encouraged to post their work online (e.g., in institutional repositories, on their website or ResearchGate) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See<a href="" target="_new">The Effect of Open Access</a>).</li> </ol> Revision of Heliotropium sects. Heliothamnus, Heliotrophytum, Hypsogenia, Plagiomeris and Platygine (Heliotropiaceae) in Chile <p>A taxonomic revision of the Chilean species of <em>Heliotropium </em>(Heliotropiaceae) is presented, excluding those of sect. <em>Cochranea </em>that were revised in a previous contribution. These species are <em>Heliotropium amplexicaule </em>(sect. <em>Heliotrophytum</em>), <em>H. corymbosum </em>(sect. <em>Heliothamnus</em>), <em>H. curassavicum </em>(sect. <em>Platygyne</em>), <em>H. geissei </em>(sect. <em>Plagiomeris</em>), <em>H. microstachyum </em>(sect. <em>Hypsogenia</em>), <em>H. paronychioides </em>(sect. <em>Plagiomeris</em>) and <em>H. patagonicum </em>(sect. <em>Platygyne</em>). I analyze in detail the nomenclature, iconography, taxonomy, systematics, distribution and bibliography of each species. <em>Heliotropium corymbosum </em>is newly reported for the flora of Chile and the new combination <em>Heliotropium corymbosum </em>var. <em>grisellum </em>is herewith proposed. This taxon is illustrated for the first time. I discuss the presence of two species of Heliotropiaceae erroneously reported for the Chilean flora: <em>Heliotropium angiospermum </em>(sect. <em>Schobera</em>) and <em>Euploca procumbens</em>. I conclude that the family Heliotropiaceae is represented in Chile only by the genus <em>Heliotropium </em>with 24 species, including 17 species previously treated under sect. <em>Cochranea. </em>I provide a key for the determination of all Chilean species of <em>Heliotropium</em>.</p> Federico Luebert Copyright (c) 2020 Federico Luebert 2020-12-31 2020-12-31 77 2 115 138 Planktonic diatom assemblage seasonal diversity used to assess environmental health in a coastal wetland of southern Chile <p>Although planktonic diatoms are one of the most abundant taxonomic groups in coastal wetlands, their assemblages have not been used to determine the environmental health of these ecosystems. Studies of ecosystem environmental health have been based on other taxonomic groups; we propose that diatom genera diversity represents a viable alternative for this purpose. Thus, our aim was to determine the alpha and beta diversities of the planktonic diatom assemblage present in Caulín Bay, Chiloé Island (41° 49’S; 73° 38’W), southern Chile, during the austral winter and spring of the years 2012 and 2014. Caulín Bay is an important site for aquatic bird observation and conservation, hunting is prohibited on a national scale and, internationally, the site has been declared an Important Bird and Biodiversity Area (IBA). Our results indicate different diversities between sampling stations, but not between the years studied. In total, we recorded 53 diatom genera, of which the most abundant were <em>Coscinodiscus </em>(21.99%) and <em>Cocconeis </em>(16.23%). The study area presented high genera diversity (i.e., H’(log2) &gt;3.74) and beta diversity indicated that Caulín presents a low level of heterogeneity and is a low genera replacement environment. Consequently, we infer that Caulín Bay is a productive and environmentally stable ecosystem. This leads us to conclude that diatom diversity determination is a viable alternative to establish aquatic ecosystem environmental health and we recommend that future conservation strategies be established for Caulín Bay.</p> <p><strong> </strong></p> Catalina Ríos-Henríquez Norka Fuentes Claudio Tobar Jaime R. Rau Fabiola Cruces Copyright (c) 2020 Catalina F. Ríos-Henríquez, Norka Fuentes, Claudio Tobar, Jaime Rau, Fabiola Cruces 2020-12-31 2020-12-31 77 2 139 151 Reproductives aspects, architecture and phenomorphology of Maytenus boaria Molina (Celastraceae) in central Chile <p><em>Maytenus boaria </em>Molina (Celastraceae) is an evergreen native tree which is widely distributed in Chile. It has a high economic potential due to its medicinal value, among others. Despite this, biological information about the species is scarce and often confusing. The objective of the study was to broaden the knowledge about reproductive aspects and the sexual system of <em>M. boaria</em>, along with its modular architecture and pheno-morphology. The study was conducted from August through December of 2016, with adults plants (n=17) selected in urban areas of the Región Metropolitana. A pollination test was performed and the sex of the flowers of each selected tree was identified. In addition, a pheno-morphological diagram of the species was made through the modular interpretation of its architecture and the identification of its phenophases. Results showed that <em>M. boaria </em>is a dioecious and andromonoecious species; it has a low autonomous autogamy and is non-apomictic species that needs pollination vectors for seed production. It has four architectural modules in its crown: dolichoblast of apical bud, dolichoblast of axillary bud, inflorescence and reproductive temporary brachyblasts which are distributed in two architectonic units. The floral biology and pheno-morphology of this species indicate that it would be in an evolutionary process regarding the functionality of hermaphroditic flowers, which has been proposed as an intermediate step from hermaphroditism to dioecy. Further knowledge of these topics will allow for a better understanding of the autoecology of the species in order to have an appropriate and productive management of it.</p> Magdalena Godoy Luz María de la Fuente Miguel Gómez Rosanna Ginocchio Copyright (c) 2020 Magdalena Godoy, Luz María de la Fuente, Miguel Gómez, Rosanna Ginocchio 2020-12-31 2020-12-31 77 2 152 167 Notes on the variation of bryophytes between a swamp forest dominated by Amomyrtus luma and an anthropogenic wet prairie of Juncus procerus <p>The bryophyte richness was evaluated in the understory of a swamp forest of <em>Amomyrtus luma </em>and an anthropogenic wet prairie of <em>Juncus procerus</em>. Bryophyte richness, and growth and life forms changed between both wetlands. Because of differences between bryophyte species, both kind of wetlands should be considered for conservation efforts.</p> Víctor Ardiles Alvaro Promis Daniela Cortés Copyright (c) 2020 Víctor Ardiles, Alvaro Promis, Daniela Cortés 2020-12-31 2020-12-31 77 2 168 175 Reinterpreting the Alstroemeria diluta Ehr. Bayer complex (Alstroemeriaceae) based on color and ornamentation of tepals, with change in geographical distribution and status of its taxa <p>The species complex <em>Alstroemeria diluta </em>Ehr. Bayer is evaluated according to a reinterpretation of the color and ornamentation of the tepals. As such, change in the distribution and a new status of infraespecific taxa are proposed.</p> Mélica Muñoz-Schick Andrés Moreira-Muñoz Copyright (c) 2020 Melica Muñoz 2020-12-31 2020-12-31 77 2 176 181 Taxonomic considerations and two new subspecies for Hymenophyllum ferrugineum Colla (Hymenophyllaceae) from Juan Fernandez Archipelago and southern South America <p>A new taxonomic status is proposed for the fern <em>Hymenophyllum ferrugineum</em>, for which two subspecies are recognized based on morphological and biogeography data. One subspecies is recognized as endemic to Juan Fernandez Archipelago and the other endemic to southern South America. It is also clarified the relationship with <em>Hymenophyllum frankliniae</em>, the morphologically closest species native from New Zealand<em>.</em></p> Roberto Rodríguez Diego Penneckamp Rodrigo Chaura Copyright (c) 2020 Roberto Rodríguez, Diego Penneckamp, Rodrigo Chaura 2020-12-31 2020-12-31 77 2 182 185 Ripartites tricholoma (Alb. & Schwein.) P. Karst. (Basidiomycota, Agaricales) a new record of genus and species for Chile <p><em>Ripartites tricholoma </em>collected in the Nature Reserve Altos de Cantillana, near Santiago is described as a first record of this fungal genus and species for Chile. This is a contribution to the knowledge of fungal diversity in <em>Nothofagus macrocarpa </em>dominated forest close to its northern limit of distribution.</p> María José Dibán Luis Felipe Hinojosa Viviana Salazar-Vidal Götz Palfner Copyright (c) 2020 María José Dibán Karmy, Luis Felipe Hinojosa, Viviana Salazar-Vidal, Götz Palfner 2020-12-31 2020-12-31 77 2 186 190 Biogeographical history of bryophytes in Chile <p>Some biogeographical features of bryophytes associated with subtropical-temperate ecosystems in Chile are examined, including diversity, concentration of species richness, endemism, biogeographical composition and disjunctions. The historical-biogeographical interpretation of these characteristics considers the major evolutionary changes of the group in three different temporal scenarios, according to geological, paleobotanical and molecular evidences. First, simple- and complex-thalloids liverworts represented in Chile are examined, belonging to the Classes Haplomitriopsida and Marchantiopsida- Marchantiidae, archaic lineages linked to the pre-Cenozoic colonization of the Pangea mega-continent. Examples of simple-thalloids liverworts of Class Jungermanniopsida-Pelliidae, hornworts of the Class Anthocerotopsida and mosses of the Classes Bryopsida and Polytrichopsida illustrate the paleo-austral distribution patterns of bryophytes from the temperate region of Chile, related to the Gondwana breakup and expansion of Angiosperms during the Cretaceous/Paleogene. A second scenario, considers the final uplift of the Andes and the development of the Arid Diagonal of South America during the Neogene, processes that have played a major role in the biogeographical structure of the Chilean and South American floras. In this context, leafy liverworts associated with the relict forests of the Chilean semi- arid coast stand out, particularly epiphyllous liverworts of the two most diverse families of the Class Jungermanniopsida-Jungermanniidae, Lejeuneaceae and Plagiochilaceae, adapted to microclimates favored by coastal fogs. The last scenario discusses the significant role of the Pleistocene glacial cycles in the expansion of the sub-Antarctic temperate-cold element throughout central-southern Chile, and its effects on the concentration of bryophyte richness associated with Chile’s temperate-rain ecosystems.</p> Carolina Villagrán Moraga Copyright (c) 2021 Carolina Villagrán Moraga 2020-12-31 2020-12-31 77 2 73 114