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8 páginas, 9 figuras, 1 tabla.[ES] Carduncellus cuatrecasasii G. López es un endemismo del sur de España: Andalucía (provincias de Córdoba, Granada, Jaén y Málaga) y Extremadura (provincia de Badajoz). Durante un tiempo se tuvo por simple variedad o subespecie de C. araneosus Boiss. & Reut., pero es en realidad una especie de Carduncellus bastante aislada, que no solo muestra un conjunto muy sólido de caracteres diferenciales frente a otras especies europeas, sino que tiene además un mecanismo peculiar de dispersión de cipselas que no parece haber sido descrito hasta la fecha.[EN] Carduncellus cuatrecasasii G. López is a endemic species of South Iberian Península (Spain): Andalucía (Córdoba, Granada, Jaén and Málaga provinces) and Extremadura (Badajoz province). Considered for a time to be only a variety or subspecies under C. araneosus Boiss. & Reut., is in fact a quite isolated species of Carduncellus showing not only a consistent set of morphologically different characters in comparison with other European ones but also a peculiar and apparently not described mechanism of cypselas dispersion: the persistent setae in the receptacle are very short and weak, the long, rigid and inconsistently deciduous pappus develop an outer series of flexuous reflexed bristles connecting it with the next ones and all the fruits are dispersed together by the wind in the form of a spherical rolling mass, the individual fruits being relaxed occasionally when this mass stick with some obstacle.Trabajo financiado con cargo al proyecto n.° PB94-0126, "Estudio sistemático y filogenético de los géneros\udCarduncellus, Lamottea y Phonus (Compositae)", de la Dirección General de Investigación Científica y Técnica\ud(DGICYT).Peer reviewe

<i>Carduncellus cuatrecasasii</i> G. López (<i>Compositae-Cardueae</i>) and a new and peculiar way of fruits dispersión