Llorenç Sáez | Universitat Autònoma de Barcelona (original) (raw)

Papers by Llorenç Sáez

Phytotaxa, Aug 29, 2019

The Lamarck’s name Buxus balearica is discussed and neotypified from a specimen preserved at MA c... more The Lamarck’s name Buxus balearica is discussed and neotypified from a specimen preserved at MA collected in Mallorca (Balearic Islands, Spain). In addition, the lectotypes of B. longifolia and B. balearica f. granatensis, currently treated as two heterotypic synonyms of B. balearica, are designated from original material preserved at G-BOIS and MA, respectively

Orsis, Nov 22, 2017

This compilation includes nomenclatural and taxonomic updates to the checklist of vascular plants... more This compilation includes nomenclatural and taxonomic updates to the checklist of vascular plants described from the Balearic Islands. This update includes plants described between 2008 and 2016, and contains corrections to other entries included in previous works.

Phytotaxa, Mar 24, 2014

A new species in the genus Primula, P. subpyrenaica, is described from the Pyrenean range in the ... more A new species in the genus Primula, P. subpyrenaica, is described from the Pyrenean range in the northeastern Iberian Peninsula. The species belongs to P. sect. Auricula, and is related to P. auricula and P. lutea mainly on a morphological basis. However, P. subpyrenaica differs from those two species and from other related taxa by various morphological characters (non-scariose and longer bracts, fragrant leaves, yellowish or brownish when pressed). Data on its ecology, taxonomic relationships and conservation status of this narrow endemic is also provided.

Orsis, organismes i sistemes: revista de botànica, zoologia i ecologia, 2013

Manuscrit rebut el novembre de 2012 Resum Presentem un conjunt de dades de caràcter corològic, de... more Manuscrit rebut el novembre de 2012 Resum Presentem un conjunt de dades de caràcter corològic, demogràfic, ecològic, i en alguns casos de caràcter morfològic, relatives a espècies de pteridòfits rars, amenaçats o poc coneguts per als Pirineus catalans (nord-est de la península Ibèrica). S'indica per primera vegada Cheilanthes tinaei als Pirineus centrals i es confirma la presència en aquesta serralada d'Equisetum × trachyodon. Es proporcionen noves dades sobre la distribució i l'abundància local de Cystopteris montana i de l'endemisme d'àrea restringida Isoetes creussensis. També es comenta la situació de la població aïllada de la rara falguera Woodsia pulchella. Destaquem les dades micromorfològiques obtingudes per a aquestes dues darreres espècies, de les quals hem estudiat caràcters esporals i fitodermològics.

Orsis, Oct 31, 2017

In this paper the following new nomenclatural combinations are proposed:

Orsis, organismes i sistemes: revista de botànica, zoologia i ecologia, 2011

Manuscrit rebut l'agost de 2010 Resum S'aporten dades per a un total de 76 tàxons. Rosa blondeana... more Manuscrit rebut l'agost de 2010 Resum S'aporten dades per a un total de 76 tàxons. Rosa blondeana Ripart ex Désegl., Silene fuscata Link ex Brot., Medicago coronata (L.) Bartal., Eragrostis curvula (Schrad.) Nees, i Eclipta prostrata (L.) L., són novetats per a la flora de les Illes Balears (les dues darreres espècies com a elements al•lòctons). D'altra banda s'aporten diverses novetats de l'àmbit insular. Com a resultat de la revisió de material d'herbari s'exclou Phleum subulatum (Savi) Asch. & Graebn. del catàleg florístic balear. Paraules clau: corologia; flora vascular; Illes Balears.

Se aportan nuevos datos sobre el origen y el alcance de las falsificaciones detectadas en los exs... more Se aportan nuevos datos sobre el origen y el alcance de las falsificaciones detectadas en los exsiccata de E.M. Reineck, que contaminan importantes herbarios. Igualmente se alerta sobre otras colecciones y publicaciones poco fiables, que hay que poner, al menos, en cuarentena.

Taxon, Oct 29, 2014

In this paper we seek to elucidate the phylogeny of Centaurea sects. Jacea and Phrygia (= sect. L... more In this paper we seek to elucidate the phylogeny of Centaurea sects. Jacea and Phrygia (= sect. Lepteranthus nom. inval.) which have long been a source of controversy. A molecular phylogenetic approach is used based on nrDNA and plastid markers. The study confirmed incongruence between datasets, which can be explained both by hybridization and the occurrence of shared ancestral polymorphisms. Both factors are critical in limiting the resolution of phylogenetic trees. Despite this, we provide an interpretation of the current European distribution of sect. Phrygia, and suggest a probable eastern center of origin for the section. Our results support previous studies in Centaurea, suggesting on molecular grounds that sects. Phrygia and Jacea can not be clearly separated, particularly when C. nigra s.l. or C. jacea s.l. coexist with other taxa of sects. Phrygia and Jacea.

Plant Systematics and Evolution, Dec 7, 2012

Low levels of genetic diversity in endemic species are generally attributable to the small size o... more Low levels of genetic diversity in endemic species are generally attributable to the small size of their populations. This lack of genetic variability will, predictably, be more evident in those species that occur in only one or a very few localities with a total population consisting of a few dozen individuals, or sometimes fewer (i.e. 'extremely narrow endemics', ENEs). We used allozyme electrophoresis to survey the genetic variability of Coristospermum huteri, an endemic species from the island of Majorca (Balearic Islands, W. Mediterranean Basin) with a single natural population of about 100 individuals. As expected, allozyme variability was virtually nil for this species (P = 8.3 %, A = 1.08, H e = 0.022), which seems to be a general rule for ENEs (mean H e = 0.057). A founder effect associated with a dispersal event from the continent is probably behind the lack of genetic diversity in this highly threatened species. Preservation of the mountain summit where the plant is found (Puig Major) is essential for the survival of C. huteri, and would also guarantee the conservation of other ENEs and rare and threatened species.

FIGURES 3–9. Box plots representing the variability of diagnostic characters of Aliella. Fig. 3. ... more FIGURES 3–9. Box plots representing the variability of diagnostic characters of Aliella. Fig. 3. Number of bracts on the peduncle. Fig. 4. Ratio of length of the bracts on the peduncle/Length of the middle bracts. Fig. 5. Female corolla width. Fig. 6. Length of sterile appendages of anthers. Fig. 7. Ratio length of cilia/bristle width of the base of the bristle. Fig. 8. Ratio length of cilia/bristle width of the middle of the bristle. Fig. 9. Ratio length of cilia/bristle width of the apex of the bristle.

Alpine Botany, 2021

Species diversity may be underestimated even in well-explored mountain regions due to the lack of... more Species diversity may be underestimated even in well-explored mountain regions due to the lack of in-depth research in taxonomically intricate groups. Filling such knowledge gap is necessary to optimize conservation management, specially for species occurring in vulnerable ecosystems such as Southern European mountains. Campanula sect. Heterophylla is a complex group with a high proportion of endemic taxa in European mountain ranges, and whose species delineation is often controversial due to extensive morphological variation. We investigated the phylogenetic relationships and evolutionary entity of its taxa occurring in the Pyrenees, with a special focus on the Pyrenean endemic C. jaubertiana (which is sometimes included as a subspecies of or merged with C. cochleariifolia ); and C. andorrana , a taxon allegedly endemic to Andorra (Eastern Pyrenees) and of uncertain taxonomic value. We obtained chloroplast genome and nuclear ribosomal DNA sequences, including several individuals of the three focus taxa, and conducted morphometric analyses. Phylogenetic analyses show that C. jaubertiana sensu lato (s. l.; i.e. including C. andorrana ) constitutes a clearly distinct lineage that is not even closely related to C. cochleariifolia ; consistent differences in floral morphology were detected between them. Our results support two main evolutionary lineages within C. jaubertiana s. l., one corresponding to populations in Central Pyrenees, and another one in Eastern Pyrenees plus Catalan Pre-Pyrenees. Given the degree of genetic and morphological differentiation, we propose the species rank for each lineage ( C. jaubertiana and C. andorrana, respectively) and provide a taxonomic treatment. These two Pyrenean endemics likely diverged through transverse allopatric speciation.

Phytotaxa, 2017

A new species of Limonium (Plumbaginaceae), L. ilergabonum sp. nov., is described from the inland... more A new species of Limonium (Plumbaginaceae), L. ilergabonum sp. nov., is described from the inland gypsum soils of the northeastern Iberian Peninsula (Flix, Tarragona province, Spain). The new species is closely related to the Iberian L. hibericum on morphological traits as assessed by multivariate ordination analysis (PCA), but it can be distinguished by the narrower leaves, inflorescence shape, and longer calyx. Limonium ilergabonum shows mixoploidy (2n = 18, 2n = 27), irregular pollen shapes, low levels of pollen stainability, and a single pollen-stigma combination morph (B type). All evidences suggest that L. ilergabonum is a polyploid relict species with an apomictic breeding system that has been originated from 2n = 18 ancestors, but to date any known extant diploid species may be suggested as a likely parental species.

Phytotaxa, 2020

Micromeria Bentham (1829: sub t. 1282) (Lamiaceae) is a monophyletic and taxonomically intricate ... more Micromeria Bentham (1829: sub t. 1282) (Lamiaceae) is a monophyletic and taxonomically intricate genus, represented by nearly 70 species. These are distributed from the Macaronesian-Mediterranean region to southern Africa, India, and China (Morales 1991b, Govaerts 1999, Harley et al. 2004, Bräuchler et al. 2005, 2008; Puppo & Meimberg 2015, Puppo et al. 2014, 2015).

Collectanea Botanica, 2019

We provide the first records of five non-native vascular plants for Europe—Commelina erecta, Cyli... more We provide the first records of five non-native vascular plants for Europe—Commelina erecta, Cylindropuntia fulgida, Dasylirion serratifolium, xGraptosedum and Senecio crassissimus, two for the Iberian Peninsula—Lobelia laxiflora subsp. angustifolia and Pennisetum flaccidum, and four for Catalonia— Dimorphotheca fruticosa, xGasteraloe beguinii, Opuntia elatior and Tradescantia sillamontana. In addition, new local records are provided for ten taxa scarcely reported for Catalonia. During the last decades, ornamental horticulture constitutes the most important source of alien plants, and some of them are potentially invasive species at a worldwide level. Most of the plants listed in this study are escaped from gardens or established as a consequence of dumping green waste. Some species are locally naturalized and in some cases they could behave as invasive.

Molecular Phylogenetics and Evolution, 2018

Target enrichment is a cost-effective sequencing technique that holds promise to elucidate evolut... more Target enrichment is a cost-effective sequencing technique that holds promise to elucidate evolutionary relationships in fast-evolving lineages. However, potential biases and impact of bioinformatic sequence treatments in phylogenetic inference have not been thoroughly explored yet. Here, we investigate this issue with the final aim to shed light into a highly diversified group of Compositae (Asteraceae) constituted by four main genera: Arctium, Cousinia, Saussurea, and Jurinea. Specifically, we compared sequence data extraction methods implemented in two easyto-use workflows, PHYLUCE and HybPiper, and assessed the impact of two filtering practices intended to reduce phylogenetic noise. In addition, we compared two phylogenetic inference methods: 1) the concatenation approach, in which all loci were concatenated in a supermatrix; and 2) the coalescence approach, in which gene trees were produced independently and then used to construct a species tree under coalescence assumptions. Here we confirm the usefulness of the set of 1061 COS targets (nuclear conserved orthology loci set developed for Compositae) across a variety of taxonomic levels. Intergeneric relationships were completely resolved: there are two sister groups, Arctium-Cousinia and Saussurea-Jurinea, which are in agreement with a morphological hypothesis. Intrageneric relationships among species of Arctium, Cousinia, and Saussurea are also well defined. Conversely, conflicting species relationships remain for Jurinea. Methodological choices significantly affected phylogenies in terms of topology, branch length, and support. Across all analyses, the phylogeny obtained using HybPiper and the strictest scheme of removing fast-evolving sites was estimated as the optimal. Regarding methodological choices, we conclude that: 1) trees obtained under the coalescence approach are more topologically congruent to each other than those inferred using the concatenation approach; 2) refining treatments only improved support values under the concatenation approach; and 3) branch support values are maximized when fast-evolving sites are removed for the concatenation approach, and when a higher number of loci is analyzed for the coalescence approach.

Data about 76 taxa are presented. Rosa blondeana Ripart ex Désegl. Silene fuscata Link ex Brot., ... more Data about 76 taxa are presented. Rosa blondeana Ripart ex Désegl. Silene fuscata Link ex Brot., Medicago coronata (L.) Bartal., Eragrostis curvula (Schrad.) Nees, and Eclipta prostrata (L.) L., are new records for the Balearic Islands (the two latters are a non native plant). On the other hand, several taxa are new records for some islands. As a result of the revisión of herbarium specimens, Phleum subulatum (Savi) Asch. & Graebn. is excluded from the Balearic flora.

Italian botanist, May 22, 2023

In this contribution, new data concerning the distribution of native vascular flora in Italy are ... more In this contribution, new data concerning the distribution of native vascular flora in Italy are presented. It includes new records, confirmations, and exclusions to the Italian administrative regions. New combinations in the genera Pilosella and Roemeria are proposed. Furthermore, the name Papaver siculum is lectotypified. Nomenclatural and distribution updates, published elsewhere, and corrigenda are provided as Suppl. material 1.

Phytotaxa, Jan 13, 2017

The genus Santolina is represented in the Iberian Peninsula and Balearic Islands mainly by two co... more The genus Santolina is represented in the Iberian Peninsula and Balearic Islands mainly by two complexes of species: S. rosmarinifolia aggr. and S. chamaecyparissus aggr., with a great similarity between the taxa included in each of these complexes. In the study of Santolina for the "Flora iberica" project, we prefer the species rank for the taxa with main differences in foliar and involucral bracts. Two new combinations, S. vedranensis and S. montiberica, are proposed here on the basis of our morphological analysis and on evidences from our ongoing molecular studies.