Alfonso Susanna de la Serna

Phylogenetic relationships in Helichrysum (Compositae: Gnaphalieae) and related genera: Incongruence between nuclear and plastid phylogenies, biogeographic and morphological patterns, and implications for generic delimitation

39 p., tablas, mapas, graf. -- Post-print del articulo publicado en Journal of Biogeography. Version revisada y corregida.

Lectotypification of Centaurea alpina L. (Compositae) and the identity of Centaurea linaresii Lázaro Ibiza

A lectotype for the name Centaurea alpina (≡ Rhaponticoides alpina, Compositae) is herein designated from original material conserved in the BM Herbarium (Clifford Herbarium). A previously accepted name, Centaurea linaresii, is treated as a synonym; this name was previously typified from original material conserved in the MAF Herbarium, but was wrongly considered as holotype. Thereafter, it is here corrected to lectotype. This is an Accepted Manuscript of an article published in Taxon on June 2014, available online: http://dx.doi.org/10.12705/633.3

Beyond the Rand Flora pattern: Phylogeny and biogeographical history of Volutaria (Compositae)

18 p., tablas, graficos, mapas -- Postprint del articulo publicado en Taxon. Version revisada y corregida.

Scanning electron microscopy coupled with energy dispersive spectrometric analysis reveals for the first time weddellite and sylvite crystals on the surface of involucral bracts and petals of two Xeranthemum L. (Compositae) species

In this work, weddellite and sylvite crystals are identified for the first time on the involucral bracts and petals of Xeranthemum annuum and Xeranthemum cylindraceum using scanning electron microscopy coupled with energy dispersive spectrometric (SEM-EDS) analysis. Well-developed crystals of weddellite (CaC2O4·2H2O) occur in the form of a tetragonal bipyramid (hhl), rarely in combination of a bipyramid and tetragonal prism (h00). Indumentum of involucral bracts of X. cylindraceum consists of nonglandular and glandular trichomes. Sylvite (KCl) crystals are observed only on the petal surface of X. cylindraceum. The crystals of sylvite occur in the form of perfect cubes (hexahedrons), but some crystals are deformed, i.e., partially elongated. Taxonomic significance of investigated microcharacters as well as the use of SEM-EDS analysis in taxonomic studies of plants are discussed.

Volutaria tubuliflora (Murb.) sennen (asteraceae), a new alien species in Chile | Volutaria tubuliflora (murb.) sennen (asteraceae), nueva especie alóctona asilvestrada para Chile

Volutaria tubuliflora (Asteraceae-Carduae) is described as a new alien plant species in Chilean vascular flora. The species has the widest range of natural geographical distribution of the genus being present from southern Europe to Arabic peninsula, inclusive Macaronesia. In Chile it has been naturalized in the Desert ecoregion, and it growths in the Atacama Region (III). Plants were found at Panamericana highway border, and apparently still have not invaded outside. In this paper we provide morphological and ecological information for this species.