Search results for "Compositae"

On the circumscription and taxonomic status of Centaurea caballeroi (Compositae)

2012

Se aportan datos sobre algunos táxones del grupo de Centaurea linifolia presentes en las sierras de la Comunidad Valenciana y áreas limítrofes. Como resultado se propone reconocer en C. antennata tres subespecies, con síndromes de caracteres propios, que ocupan áreas geográficas bien delimitadas y presentan un comportamiento ecológico diferenciado. Según esto, se propone la nueva combinación C. antennata subsp. caballeroi para las poblaciones del sur de Tarragona y norte de Castellón, seleccionándose además un lectótipo. Para cada taxon aceptado se indican sus caracteres morfológicos diferenciales, distribución y ecología. Además, se aporta una clave de identificación. Data are reported on …

Il genere Crupina (Asteraceae): prime indagini negli erbari italiani

2009

Data from: Genetic and ecotypic differentiation in a Californian plant polyploid complex (Grindelia, Asteraceae)

2015

Studies of ecotypic differentiation in the California Floristic Province have contributed greatly to plant evolutionary biology since the pioneering work of Clausen, Keck, and Hiesey. The extent of gene flow and genetic differentiation across interfertile ecotypes that span major habitats in the California Floristic Province is understudied, however, and is important for understanding the prospects for local adaptation to evolve or persist in the face of potential gene flow across populations in different ecological settings. We used microsatellite data to examine local differentiation in one of these lineages, the Pacific Coast polyploid complex of the plant genus Grindelia (Asteraceae). W…

Cynipid wasps inducing galls on plants of the genus Picris (Asteraceae) in Europe, with a description of a new species of Phanacis Foerster (Hymenopt…

2008

13 paginas y 8 figuras

Phytochemical Studies on Ptilostemon greuteri Raimondo & Domina (Compositae)

2012

Ptilostemon greuteri Raimondo & Domina is described as a new species and its growth is limited to the area of the province of Trapani. Essential oils of aerial parts of P. greuteri were analized by gas chromatography-mass spectrometry (GC-MS). The analysis of acetonic extract of aerial parts led to identification of triterpenes components: α-amyrin, β-amyrin, α-amyrin acetate, β-amyrin acetate, lupeol, lupeol acetate and taraxasterol. CC and preparative TLC of acetonic extracts has yielded lignan lactone and a sesquiterpene lactone that have been isolated previously from other Ptilostemon species.

Melampolides from Enydra anagallis

2001

The investigation of an Argentine collection of Enydra anagallis afforded sesquiterpene lactones of the melampolide type two of which were previously known. Their structures were elucidated by spectroscopic methods. Fil: Bardon, Alicia del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina Fil: Cardona, Luis. Universidad de Valencia; España Fil: Cartagena, Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. In…

The Centaurea parlatoris complex (Asteraceae): taxonomic checklist and typifications

2021

A taxonomic account of the Centaurea parlatoris complex (Asteraceae), endemic to Sicily, is presented. This complex includes six taxa, three described in the 19th century (C. parlatoris, C. parlatoris var. tomentosa and C. parlatoris var. virescens) and three recently described (C. sicana, C. giardinae and C. heywoodiana). Starting from the designation of the types for the oldest plant names that have not been typified yet, taxonomic considerations are formulated and C. parlatoris var. virescens is elevated to the rank of species. An identification key and a distribution map complete this account.

Heterotheca subaxilaris (Compositae), nuevo xenófito para la flora ibérica

2017

Heterotheca subaxillaris (Compositae), a new xenophyte for the iberian flora. A first reference on the presence of Heterotheca subaxillaris (Lam.) Britton & Rusby (Compositae), native of North America, in the iberian flora is provided. This species has been located at the CV-10 highway, in la Pobla Tornesa, Castellón province (Spain).

Sesquiterpene compounds from Inula Viscosa

2007

Two new compounds, 2,5-dihydroxyisocostic acid and 2,3-dihydroxycostic acid together with three known sesquiterpene compounds, Isocostic acid, Carabrone and Tomentosin, have been isolated from the acetone extract of Inula viscosa (L.) Aiton. The structures of all new compounds were determined by spectroscopic methods, in particular 1D and 2D (1)H- and (13)C-NMR. The (13)C-NMR spectra of Isocostic acid and of Tomentosin are reported here for the first time.