Centaurea cineraria L. (Compositae: Cardueae: Centaureinae), part of the group, is described and illustrated, notes provided on its cultivation, propagation, pests diseases availability. Within current concepts full synonymy C. gymnocapra are along with type citations known distribution material. The infrageneric divisions commented briefly. varying treatments complex species discussed, some cl...

Hybridization between tetraploids and their related diploids is generally unsuccessful in Centaurea, hence natural formation of triploid hybrids is rare. In contrast, the diploid Centaurea aspera and the allotetraploid C. seridis coexist in several contact zones where a high frequency of triploid hybrids is found. We analyzed the floral biology of the three taxa to identify reproductive isolati...

Selenium (Se) at high concentrations can cause toxic effects in plants, whereas at low concentrations it enhances resistance to certain abiotic stresses. The possible mechanisms of the Se-enhanced tolerance of plants to salinity stress remain elusive. In this work, effect of Se supplementation at 0, 0.1, 1 and 10 mg l-1 sodium selenate was studied in Lallemantia iberica plants subjected to salt...

The classical approach to predicting the geographical extent of species invasions consists of training models in the native range and projecting them in distinct, potentially invasible areas. However, recent studies have demonstrated that this approach could be hampered by a change of the realized climatic niche, allowing invasive species to spread into habitats in the invaded ranges that are c...

En los afloramientos cretácicos de Cuevas Portalrubio próximos a Montalbán (provincia Teruel) ubicados en la Cordillera Ibérica se han identificado varias especies Foraminíferos. Además, Manfred Reichel 1936, describió Alveolínidos: Praealveolina iberica y debilis. este trabajo recogen datos históricos las aportaciones biocronoestratigráficas obtenidas estos afloramientos.

Short-fringed or tyrol knapweed, Centaurea dubia (Asteraceae) is an invasive plant of fields and roadsides in the eastern United States. Insects from the plant’s native Eurasian range have been introduced into North America in an attempt to control the spread of related Centaurea species. One of these biological control agents, Urophora quadrifasciata (Diptera: Tephritidae), a picture-winged se...

Five species of eriophyoid mites were identified during surveys of mite fauna associated with plant species of the family Compositae from Southwest of East Azerbaijan province during 2010 and 2011. Two of them, Aceria virgatae n. sp. from Centaurea virgata Lam. and Aceria xeranthenzis n. sp. from Xeranthemumn squarrosum Boiss., were found to be new to science. No damage symptoms were observed o...

the essential oils from compositae specie of iran: centaurea behen l. obtained by hydrodistillation was analyzed by gc and gc/ms.  β-caryooyllane (24.5%), β-selinene (13.9%) and valencene (11.7%) were the main components among the sixteen constituents characterized in the oil of centaurea behen representing  93.7% of the total components detected.