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Una especie nueva de Linaria sect. Supinae en la Sierra de Gredos (Sistema Central, Peninsula Iberica)Linaria vettonica Luceno, Mazuecos & P. Vargas, a new species of Linaria sect. Supinae, is described. It is a narrow endemic inhabiting the southern hills of the western and central massifs of Sierra de Gredos (Sistema Central mountains, Iberian Peninsula). The five populations found occur on siliceous, sandy soils of Quercus pyrenaica woodland clearings and slopes. L. vettonica can be distinguished from Linaria caesia by the densely glandular-pubescent inflorescence, dark purple corolla and brown seeds with tuberculate disc, and from L. aeruginea by its erect fertile stems and dark purple -never blackishcorolla.Key words: Linaria, Sierra de Gredos, narrow endemic, taxonomy, seed micromorphology. ResumenSe describe Linaria vettonica Luceno, Mazuecos & P. Vargas, una nueva especie de Linaria sect. Supinae. Se trata de un endemismo restringido que se distribuye por las vertientes meridionales de los macizos occidental y central de la Sierra de Gredos (Sistema Central, Peninsula Iberica). Las cinco poblaciones encontradas aparecieron sobre suelos arenosos siliceos en claros y laderas de bosques de Quercus pyrenaica. L. vettonica se distingue de L. caesia por sus inflorescencias densamente glandular-pubescentes, corolas de color purpura oscuro y semillas marrones con disco ornamentado con numerosos tuberculos. De L. aeruginea se distingue por sus tallos fertiles erectos y sus flores de color purpura oscuro, nunca negruzcas.Palabras clave: Linaria, sierra de Gredos, endemismo restringido, taxonomia, micromorfologia de semillas.

A new species of Linaria sect. Supinae from Sierra de Gredos (Sistema Central mountains, Iberian Peninsula)