This study was carried out in the municipality of El Rosario, located on the southern slope of Tenerife, Canary Islands, within the Las Lagunetas Protected Landscape and Special Areas of Conservation (SACs) of The Nature 2000 protected areas network. This area has been affected by fires throughout history, such as the one on July 27, 2007, and more recently the major fire on August 15, 2023, which lasted until November 10 of that same year, affecting 13,977,1 ha of the island. The disturbed area of the municipality occupies a total of 601,27 ha, or 4,3% of the municipality (IDCanarias). Due to the size of the altered surface and the inaccessibility of some areas due to the risk of tree falls, it was decided to carry out the phytosociological plots in a route that covered the protected area from 1100 masl to 1400 masl, starting at the Los Ovejeros track (28° 25' 34.20" N 16° 23' 6.84" W) and ending at the El Bailadero track (28º24'57’’ N 16º24'9’’ W). A bioclimatic study has been prepared for the area affected by the fire based on the methodology of Global Bioclimatic Classification, "Global Bioclimatics", by Rivas-Martínez & al. (2011). The phytosociological research was carried out using the Braun-Blanquet methodology (1979) on 10 plots inventoried from January to June 2024 and from January to April 2025. The study area was selected based on the degree of affectation according to the Normalized Difference Vegetation Index (NDVI) and the type of vegetation, with a size ranging from 20 to 100 m2. The QGIS program was subsequently used to georeferenced the phytosociological plots and create maps. Using infrared satellite images after the fire (IDCanarias), and in conjunction with the QGIS program, a damage level map was created at three different levels to differentiate the highest-priority areas for restoration proposals. Likewise, maps of both potential and current vegetation were created to determine the composition of the subsequent restoration units. We can conclude that 56% of the municipality of El Rosario was disturbed, with the highest level of damage. The potential vegetation units affected by the fire were a total of six syntaxa, with the Siderito solutae-Pino canariensis sigmetum pine forest being the one with the greatest damage. Two new subassociations are described and typified Trifolio subterranei-Poetum bulbosae subass. romuleatosum grandiscapae, Galio aparines-Torilidetum neglectae subass. sonchusetosum oleracei. A catalogue of opportunistic invasive species in the wild was compiled, citing for the first time, for the entire European territory, the taxon Crassocephalum crepidioides (Benth.) S. Moore, a species native to tropical Africa, South Africa and Madagascar.
Herbarium collections are invaluable tools for documenting biodiversity and reconstructing species introduction histories. In this study, we report the earliest known record of the California poppy (Eschscholzia californica Cham.) in Spain, based on an herbarium specimen collected by Agustín Cabrera in June 1890 and preserved at the Cabrera Pinto High School Museum in Tenerife (Canary Islands). This finding predates previous records by over 60 years and reveals that the species was already present in the Canary Islands by the late 19th century. The new evidence significantly extends the estimated residence time of E. californica in Spain, which is crucial for understanding its naturalisation dynamics and invasive potential. Our results support the increasingly recognised value of historical herbarium collections in invasion biology and underscore the importance of exploring underutilised regional herbaria. This case contributes to a growing body of research re-evaluating the timelines of plant introductions in Europe and highlights the need to integrate historical data into current invasive species management frameworks.
Carex halleriana, a name from the 18th Century published by Asso (1779), is herein typified. Asso was the first botanist to follow the Linnaean nomenclature system in peninsular Spain. Although Asso refers to an earlier polynomial name by Haller, it seems that he did not study Haller´s herbarium. Therefore, we designate lectotype on a drawing published by Asso (1779). In order to support the identity of the type and to facilitate the interpretation of the species, we also propose an epitype collected from a locality cited in the original description.
The typification of the name Ipomoea sagittata (Convolvulaceae) is revised. A “holotype” had previously been indicated by Austin and McDonald in 2014 from a specimen kept in the Desfontaines herbarium at P. However, the original material comprises more than one specimen. Therefore, a lectotype for this name is designated in this work according to the International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code of 2018). The name is lectotypified using a specimen collected by Jean Louis Marie Poiret in “Numidia” (Algeria) between 1785 and 1786 and currently preserved at P.
The taxonomy and above all the nomenclature of subgenus Hermione in genus Narcissus has been controversial, especially with respect to the names N. serotinus, N. elegans and N. obsoletus, which have been interpreted in diverging ways by many authors for almost two centuries. In this work the names N. elegans and N. obsoletus have been lectotypified and epitypified, the name N. elegans var. fallax has been lectotypified and the historical background of their taxonomic treatments and confusion has been discussed. The main morphological differences between taxa in section Serotini have been presented, along with genome size data of two populations of N. obsoletus.
