Phlomis lychnitis (Lamiaceae), una adición a la flora de África desde Marruecos

Phlomis lychnitis is here recorded for the first time within the African continent. So far, known only from Morocco in the Oriental High Atlas. Description of the species as well as first data about its ecology in Morocco together with geographical distribution and diagnostic features with the morphologically closest taxon sharing yellow-colored flowers are given. Photographic illustrations and an updated key to the Phlomis species in Morocco are also provided.Phlomis lychnitis se registra por primera vez en el continente africano. Hasta el momento, sólo se conoce de Marruecos en el Alto Atlas Oriental. Se proporciona una descripción de la especie, así como los primeros datos sobre su ecología en Marruecos junto con su distribución geográfica y caracteres diagnósticos con la especie morfológicamente más cercana que comparte flores de color amarillo. También se proporcionan fotografías y una clave actualizada de las especies de Phlomis en Marruecos

Chenopodium hoggarense (Amaranthaceae), a new species from Algeria and Chad

Chenopodium hoggarense Uotila & C. Chatel., a new species of the family Amaranthaceae s.l. (Chenopodiaceae s.str.) from the Hoggar and Tibesti mountains of the Sahara, in Algeria and Chad, is described and illustrated. The species was found in quantities from the Hoggar (Ahaggar) mountains in 2019. It had been observed there earlier several times, but it was confused with C. vulvaria L. because of its similar smell and dense cover of vesicular hairs. However, it differs from C. vulvaria in growth habit, leaf shape and flower characters. Its relationships to and the identity of C. vulvaria var. incisum Maire are discussed and var. incisum is lectotypified. Chenopodium hoggarense is known only from the isolated Hoggar and Tibesti mountains.Peer reviewe

The distribution of biodiversity richness in the tropics

We compare the numbers of vascular plant species in the three major tropical areas. The Afrotropical Region (Africa south of the Sahara Desert plus Madagascar), roughly equal in size to the Latin American Region (Mexico southward), has only 56,451 recorded species (about 170 being added annually), as compared with 118,308 recorded species (about 750 being added annually) in Latin America. Southeast Asia, only a quarter the size of the other two tropical areas, has approximately 50,000 recorded species, with an average of 364 being added annually. Thus, Tropical Asia is likely to be proportionately richest in plant diversity, and for biodiversity in general, for its size. In the animal groups we reviewed, the patterns of species diversity were mostly similar except for mammals and butterflies. Judged from these relationships, Latin America may be home to at least a third of global biodiversity

The global naturalized Alien Flora (GloNAF) database

This dataset provides the Global Naturalized Alien Flora (GloNAF) database, ver-sion 1.2. Glo NAF represents a data compendium on th e occurrence and identit y of naturalizedalien vascular plant taxa across geographic regions (e.g. countries, states, provinces, districts,islands) around the globe. The dataset includes 13,939 taxa and covers 1,029 regions (including381 islands). The dataset is based on 210 data sources. For each ta x on-b y-region combination, wepr ovide information on whether the tax on is consider ed to be naturalized in the specific region(i.e. has established self-sustaining popula tions in the wild). Non-native taxa are marked as“alien”, when it is not clear whether they are naturalized. To facilitate alignment with other plantdatabases, we pro v ide f or each taxon the name as given in the original data source and the stan-dardized taxon and family names used by The Plant List Version 1.1 (http://www.theplantlist.org/). We pro vide an ESRI shapefile including polygons f or each region and informa tion on whetherit is an island or a mainland region, the country and the Taxonomic Databases Working Group(TDWG) regions it is part of (TDWG levels 1–4). We also provide several variables that can beused to filter the data according to quality and completeness of alien taxon lists, which varyamong the combinations of regions and da ta sources. A pre vious version of the GloNAF dataset(version 1.1) has already been used in several studies on, for example, historical spatial flows oftaxa between continents and geographical patterns and determinants of naturalization across dif-ferent taxonomic groups. We intend the updated and expanded GloNAF version presented hereto be a global resource useful for studying plant inv asions and changes in biodiversity from regio-nal to global scales. We release these data into the public domain under a Crea ti ve CommonsZer o license waiver (https://creati v ecommons.org/share-y our -work/public-domain/cc0/). Wheny ou use the da ta in your publication, we request that y ou cite this da ta paper. If GloN AF is amajor part of the data analyzed in your study, you should consider inviting the GloNAF coreteam (see Metadata S1: Originators in the Overall project description) as collaborators. If youplan to use the GloNAF dataset, we encourage y ou to contact the GloNAF core team to checkwhether there have been recent updates of the dataset, and whether similar analyses are already ongoing

eFlore du Maghreb, une flore électronique basée sur la Nouvelle flore d’Algérie de P. Quézel et S. Santa / eFlore of Magreb, an electronic flora based on the new flora of P. Quézel & S. Santa

In 1962-1963, Pierre Quézel and Sébastien Santa published the Nouvelle flore d’Algérie et des régions désertiques méridionales. The current paper explains the reasons and the need to update the information of this book that has been out of print for many years, while taking advantage of digital tools, both for the iconographic and nomenclatural content and for the open access distribution. The objective is to provide a digital flora covering Morocco, Algeria and Tunisia by involving both specialists and amateurs, to create a dynamics of floristic research in this biodiversity hotspot.En 1962-1963, Pierre Quézel et Sébastien Santa publiaient la Nouvelle flore d’Algérie et des régions désertiques méridionales. Cet article explique les raisons et la nécessité de mettre enfin à jour les informations de cet ouvrage de référence qui est épuisé depuis de nombreuses années, tout en tirant parti de l’outil numérique, tant pour le contenu iconographique et nomenclatural que pour sa diffusion en libre accès. L’objectif est de mettre à disposition une flore numérique couvrant le Maroc, l’Algérie et la Tunisie en faisant intervenir tant les spécialistes que les amateurs éclairés, afin de créer une dynamique de recherche floristique sur ce point chaud de biodiversité.Chatelain Cyrille, Medjahdi Boumediene, Benhouhou Salima S. eFlore du Maghreb, une flore électronique basée sur la Nouvelle flore d’Algérie de P. Quézel et S. Santa / eFlore of Magreb, an electronic flora based on the new flora of P. Quézel & S. Santa. In: Ecologia mediterranea, tome 44 n°2, 2018. Hommage scientifique au professeur Pierre Quézel (1926-2015) pp. 131-136

Richness, similarity and specificity of Madagascar flora compared with Sub-Saharan Africa

Background and aims – Based on presence/absence information for all angiosperms in Tropical Africa, Southern Africa and Madagascar, we review the similarities and differences between these floras. We compare specific and generic richness for the three areas, and examine their degree of overlap. Madagascar and Sub-Saharan Africa are compared in terms of: the specific and generic richness of their angiosperm families, and specific richness of their genera. Methods – Using the African Plant Database, global figures of specific and generic richness for Tropical Africa, Southern Africa and Madagascar have been calculated and illustrated by Venn diagrams. For each family or genus similarity between Sub-Saharan Africa and Madagascar has been calculated using the Jaccard Index. Madagascar specificity has been defined as the ratio of Madagascar-exclusive species richness to total richness. Key results – The study confirms the general trends of richness and endemism in the Malagasy flora, but provides accurate figures based on the current state of angiosperm taxonomy. Overlap between the floras of Southern African, Tropical African and Madagascar flora is provided with precise figures. Similarity between Madagascar and Sub-Saharan Africa is very low at species level (0.029) and eight times higher at generic level (0.246). Madagascar specificity reaches 0.165 at specific level and 0.105 at generic level. Calculation of these two indexes for families and genera, based for the first time on APG III, confirms general trends observed so far, and the richest families of the Malagasy flora are listed according to major patterns of their diversity and distribution

Forest cover changes in Côte d'Ivoire and Upper Guinea

Results are given of a study on the changes in forest cover in Côte d'Ivoire from 1990 to 2000 based on satellite images. The changes in forest cover were investigated at 4 scales of resolution. Firstly, the total forest area in West Africa was determined. Then, the total forest cover of Côte d'Ivoire, in particular the total protected area, was analysed. Thirdly, the forest cover in the region of Abidjan was also analysed as an example for the country. Finally, forest fragmentation was investigated in detail for 8 blocks of 20×20 km in Abidjan