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Andalusia, together with Morocco, is considered part of one of the two main biodiversity centres existing in the Mediterranean Basin; the other one is in the east and includes part of Turkey and Greece. The Andalusian flora has a fundamental role in this recognition, having been studied since the 1st century A.D. Despite Andalusia having been visited by a myriad of Iberian and foreign botanists, there is still no synthetic work on this subject. In this contribution, we present the first checklist of the Andalusian vascular flora, listing 4437 taxa distributed in 171 families, 1107 genera, 4091 species, and 346 subspecies, of which 3958 are native and 479 alien. Therophytes predominate (1516, 34.2%), followed by hemicryptophytes (1219, 27.5%) and chamaephytes (628, 14.1%). In addition, 462 (10.4%) are endemic or sub-endemic to the territory, and 595 (13.4%) are subject to some degree of threat (135 critically endangered, 137 endangered, and 323 vulnerable).

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Abstract.-The Baetic mountains are a very important centre of plant diversity and endemicity. The current environmental legislation includes many of these localities. In order to assess the current reserves network and to propose a selection of protected areas, and to examine the biogeographic distinctiveness of that selection, we applied to the orophilous endemic flora a variety of algorithms (some of which were never used for Europe before) on the Baetic ranges. In order to preserve this natural heritage, it would be necessary to protect at least twelve massifs, considering the siliceous portion of Sierra Nevada as a great priority area. The most notable gaps in the legislation are the ranges of Gádor, Revolcadores and La Pandera. The selected localities were characterized by their great biogeographical distinctiveness. The distinctiveness of the obtained selections stresses their reliability and also emphasizes the suitability of the biogeographic researches of the flora of the Baetic ranges for conservation objectives.Key words : biodiversity hot-spot -phytogeography -plant conservation -plant endemism -Tabu search.Résumé.-Les montagnes bétiques sont un centre très important de diversité de végétaux et d'endémicité. La législation environnementale actuelle inclut plusieurs de ces localités. Afin d'évaluer le réseau de réserves actuel, le choix des secteurs protégés et d'examiner les particularités biogéographiques de ce choix, nous avons appliqué à la flore endémique de la haute montagne quelques algorithmes (dont certains jamais employés pour l'Europe) aux cordillères bétiques. Afin de préserver cet héritage, il serait nécessaire de protéger au moins douze massifs, la partie siliceuse de la Sierra Nevada etant un grand secteur prioritaire. Les lacunes les plus notables dans la législation sont les chaînes de Gádor, de Revolcadores et de La Pandera. Les localités choisies ont été retenues pour leurs grandes particularités biogéographiques. La particularitié du choix obtenu indique son ajustement et montre la valeur des investigations sur la flore des montagnes bétiques pour des objectifs de conservation.Mots clés : hotspot de biodiversité -phytogéographie -conservation -endé-misme -Tabu search.

A new species of the genus Linaria is described, illustrated and compared with its morphologically closest relatives from L. sect. Versicolores: L. salzmannii, L. viscosa and L. spartea. Furthermore, the identity of L. salzmannii, with which it has been usually misidentified, is discussed. The new species occurs on molasse substrates, forming part of communities of ephemeral annual herbs, in the province of Málaga (southern Spain), near the locality El Chorro. Synonymy is revised for the concerned names, and an identification key is reported for the Iberian taxa of L. sect. Versicolores.